Guess I am lucky but my Plum Crazy lower, Bear Creek 7.62 x 39 upper and C Product mags never has had a FTF or FTE. Only modification is a Wolf hammer spring for the harder primers. It's a great hog gun.
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That was an awesome raid I've been thinking about doing just that!Making An AR-15 in 7.62×39 Work Reliably
Posted November 25, 2014 in DIY, Hunting, Shooting by Major Pandemic with No Comments
Running the 7.62×39 in the AR-15 platform has gotten somewhat of a bad rap. Read through forums and you would think people are a little bi-polar, with one post saying they could never get it to work and the next post noting they bought one off the shelf or built one and never had an issue. Kinda like people who love or hate the 300 Blackout.
Just as I was a fan of the previously cheap-to-shoot 5.45×39 round, I am a fan of the now cheap 7.62×39 round. Prices on that 5.45×39 round shot up a bit after they prevented cheap import surplus rounds, but the 7.62×39 round is still cheap and has been even through the great ammo crisis of the last ten years. I am not kidding. I could actually walk into Cabelas and buy whatever quality I wanted of $6 per 20 boxes of steel cased AK-47 rounds.
I have a lot of time behind my AK-47 at this point thanks to 7.62×39 ammo availability. Currently, I am seeing that the venerable 7.62×39 round is still consistently 20%+ less expensive than .223 for plinking rounds. My thought was, “Why not complete a build that could save enough money on the first 2,000 rounds to pay for the entire 7.62×39 AR-15 upper?
Why A 7.62X39 AR-15 Upper?
Some people will ask why you would ever want a 7.62×39 AR-15 upper. Beyond the cost savings, the 7.62×39 is actually a more versatile round in many respects than the 5.56 Nato round and has proven itself as a better deer and hog round by AK-47 hunters. Heck, the 7.62×39 round is basically just an up-powered 30-30 round, which is arguably the most successful deer hunting round in America. The 7.62×39 delivers more energy than the 5.56 Nato/.223 Remington or 300 Blackout out to the 200 yard mark, which is where over 95% of training, plinking, defensive, and hunting shooting is done.
Many will say why not just use the 300 Blackout? Well, from my experience the 300 Blackout round shares many of the same functional reliability problems as the 7.62×39 round running in an AR-15 unless either caliber are well tuned. Yes, yes, I know your 300 BO rifle runs great, but mine needed tuning to run both subsonic and high velocity rounds. Then there’s the fact that the 300 Blackout is still $1.00 a round compared to $0.40 per .223 round and $0.30 per 7.62×39 round. The 300 Blackout has its place, but a working AR-15 7.62×39 upper can deliver more power for less money–you know, if you can get it working.
Major Functioning Issues Of The 7.62X39 In An AR-15
The most significant problem with the AR-15 format running AK-47 ammo has been feeding and functioning. There have been a lot of theories on what exactly is needed to make the round run in the AR-15, but usually it seems to come down to recommendations to start cutting on magazines. I don’t think magazines alone are the culprits. I wanted to see if I could figure it out for you and in the process have some fun with this awesome round.
Every possible problem I could have had with this build, I experienced. Nothing came easy. I placed an order with Delta Team Tactical for a $139 16” 7.62×39 Melonite Barrel with a Carbine length gas system and their complete $139 7.62×39 Phosphate Bolt Carrier Group. Although inexpensive and high quality products, the company could not have screwed up my order more if had been somehow intentional. A month later, I was still working through them sending me the wrong thing–again. Problems were eventually resolved.
I plugged the barrel in a Anderson Manufacturing blemished $40 upper and then used a new Parallax Tactical M-Lock forend. The only real high dollar components on the upper were a Fortis gas block and a Lantac Dragon comp to take the bite out of the heavier recoiling round. A Lucid red dot topped the upper, but it would be months before I was able to really get to using it. For the majority of testing I used my WMD Beast lower.
Getting The 7.62X39 To Work In An AR-15
Once assembled, I ran to the range, excited to function test the build. Testing centered around the inexpensive ammo, with a couple steel cased Wolf and Cabelas Herter’s 7.62×39 rounds using Magpul Pmags and some C-product 6.8 SPC mags, which some had noted would work just fine if used with just a few rounds. They didn’t.
The upper would not feed more than one round at a time and even then seemed to jam the first round on the center of the M4 feed ramp. In many cases it would not even fully extract. When the gun did cycle, it was also short stroking big time and was nowhere near approaching the point where it would lock back on the magazine. Problems? I had problems. Surprisingly the only problem I did not have was detonation. Many have noted that you need a special firing pin, but at least with this standard Mil-Spec lower trigger, there were no detonation issues.
After the first time out, I realized the gun was way, way, way under gassed, with a far too small barrel gas port hole, I also needed a dedicated AR-15 7.62×39 magazine for testing and needed some work on the barrel’s feed ramps.
Many range trips later (test, fail, tinker, and repeat), I had polished the feed ramps to a mirror finish and drilled out the barrel gas port to a huge 1/8 (.125″) size, and suddenly the gun was locking back and at least trying valiantly to pick up the next round in the magazine. Jam city, even with the C-Products dedicated 7.62×39 magazine feeding FMJ, but I really could not fault the magazine. There was more wrong here than magazine issues and what my aggressive feed ramp polish would resolve. That split feed ramp was an issue.
What I found was that most people had figured out the gas port size problem, but feeding was always an issue, and I saw only one company address it completely and that was Bushmaster. Bushmaster offered a 7.62×39 rifle, and from all accounts, it fed and functioned like a dream. The main design difference in these rifles were oversized gas ports and a single large feed ramp, which in essence removed the split between the M4 feedramps to just form one giant ramp.
This made sense because, due to the tapered case of the AK47 round. The round would angle toward the center of the feed ramp when the bolt attempted to pick it up, and guess what is in the middle. Yep, the split in the middle of the M4 feed ramps. So, I whipped out the Dremel and got to grinding away the split. Sure, I took a couple deep breaths before I basically trashed a perfectly good barrel extension, but in my mind it had to be done. It worked perfectly. In fact, now I can feed this upper with pretty much any magazine, but the C-Products dedicated 7.62×39 magazines delivered the best high capacity performance. I would expect any unmodified Stoner and ACS clone 7.62×39 magazines to deliver the same performance.
I have now put twenty full mags through this upper, running on a variety of lower receivers (including the WMD Guns Beast lower) and it has performed outstandingly. In fact, I have had zero functional issues in those 600 rounds other than the very occasional bad round, which is expected with inexpensive ammo.
Why Has Someone Not Figured This Out Before?
Well they have. Bushmaster did, but it was not very popular, leading them to discontinue it. From what I can tell, the single large feed ramp idea died with the discontinued product line. The major problems are that the gas port sizes are almost always too small for the 7.62×39 round and that the split M4 feed ramps only cause jams. If barrel manufacturers delivered a single large feed ramp and 1/8″ gas port hole in the barrel, almost all the issues would be resolved. Add in some dedicated 7.62×39 magazines and you are good to go.
If you have feeding issues, Dremel out the middle of the M4 feed ramp, and it’s likely any feeding issues you are having will disappear. If your bolt is not locking back on the last round, you probably need a larger gas port. In my case I needed to enlarge mine to 1/8″, but you might be able to get away with a smaller port, depending on your build. This process is as simple as removing the gas block and then carefully drilling out the gas port hole to a larger size. I would start smaller and slowly increase the size.
Final Thoughts
Apparently, there are many people who have been able to just buy working 7.62×39 uppers, slam in a dedicated 7.62×39 magazine, and start rocking the round, but the vast majority of folks have issues of some sort. Hopefully, my tips and modifications will allow you to build and enjoy a problem-free AR-15 7.62×39 upper and save some cash in the process as you enjoy a cheaper to shoot AK-47 round. Next up? How about a 7.62×39 AR-15 pistol build.
Sources
Mine bangs out the cheap steel or pricier brass. I guess I got lucky, no problems as of yet.
you cant get 7.62x39 ammo cheap anymore, hell you cant even find it for sale. its kinda pointless imo. meanwhile i have seen the shelves full of .300 blackout. i am a ak guy myself but i have since switched to other larger calibers. pretty damn retarded they made that russian ammo ban.
I’m guessing you haven’t ever shot a 30/30. 7.62x39 an up powered 30/30 haaaa lol. Not even close. 30/30 is closer to 7.62x54. Lot more kick. 7.62x39 is a fun light round.Making An AR-15 in 7.62×39 Work Reliably
Posted November 25, 2014 in DIY, Hunting, Shooting by Major Pandemic with No Comments
Running the 7.62×39 in the AR-15 platform has gotten somewhat of a bad rap. Read through forums and you would think people are a little bi-polar, with one post saying they could never get it to work and the next post noting they bought one off the shelf or built one and never had an issue. Kinda like people who love or hate the 300 Blackout.
Just as I was a fan of the previously cheap-to-shoot 5.45×39 round, I am a fan of the now cheap 7.62×39 round. Prices on that 5.45×39 round shot up a bit after they prevented cheap import surplus rounds, but the 7.62×39 round is still cheap and has been even through the great ammo crisis of the last ten years. I am not kidding. I could actually walk into Cabelas and buy whatever quality I wanted of $6 per 20 boxes of steel cased AK-47 rounds.
I have a lot of time behind my AK-47 at this point thanks to 7.62×39 ammo availability. Currently, I am seeing that the venerable 7.62×39 round is still consistently 20%+ less expensive than .223 for plinking rounds. My thought was, “Why not complete a build that could save enough money on the first 2,000 rounds to pay for the entire 7.62×39 AR-15 upper?
Why A 7.62X39 AR-15 Upper?
Some people will ask why you would ever want a 7.62×39 AR-15 upper. Beyond the cost savings, the 7.62×39 is actually a more versatile round in many respects than the 5.56 Nato round and has proven itself as a better deer and hog round by AK-47 hunters. Heck, the 7.62×39 round is basically just an up-powered 30-30 round, which is arguably the most successful deer hunting round in America. The 7.62×39 delivers more energy than the 5.56 Nato/.223 Remington or 300 Blackout out to the 200 yard mark, which is where over 95% of training, plinking, defensive, and hunting shooting is done.
Many will say why not just use the 300 Blackout? Well, from my experience the 300 Blackout round shares many of the same functional reliability problems as the 7.62×39 round running in an AR-15 unless either caliber are well tuned. Yes, yes, I know your 300 BO rifle runs great, but mine needed tuning to run both subsonic and high velocity rounds. Then there’s the fact that the 300 Blackout is still $1.00 a round compared to $0.40 per .223 round and $0.30 per 7.62×39 round. The 300 Blackout has its place, but a working AR-15 7.62×39 upper can deliver more power for less money–you know, if you can get it working.
Major Functioning Issues Of The 7.62X39 In An AR-15
The most significant problem with the AR-15 format running AK-47 ammo has been feeding and functioning. There have been a lot of theories on what exactly is needed to make the round run in the AR-15, but usually it seems to come down to recommendations to start cutting on magazines. I don’t think magazines alone are the culprits. I wanted to see if I could figure it out for you and in the process have some fun with this awesome round.
Every possible problem I could have had with this build, I experienced. Nothing came easy. I placed an order with Delta Team Tactical for a $139 16” 7.62×39 Melonite Barrel with a Carbine length gas system and their complete $139 7.62×39 Phosphate Bolt Carrier Group. Although inexpensive and high quality products, the company could not have screwed up my order more if had been somehow intentional. A month later, I was still working through them sending me the wrong thing–again. Problems were eventually resolved.
I plugged the barrel in a Anderson Manufacturing blemished $40 upper and then used a new Parallax Tactical M-Lock forend. The only real high dollar components on the upper were a Fortis gas block and a Lantac Dragon comp to take the bite out of the heavier recoiling round. A Lucid red dot topped the upper, but it would be months before I was able to really get to using it. For the majority of testing I used my WMD Beast lower.
Getting The 7.62X39 To Work In An AR-15
Once assembled, I ran to the range, excited to function test the build. Testing centered around the inexpensive ammo, with a couple steel cased Wolf and Cabelas Herter’s 7.62×39 rounds using Magpul Pmags and some C-product 6.8 SPC mags, which some had noted would work just fine if used with just a few rounds. They didn’t.
The upper would not feed more than one round at a time and even then seemed to jam the first round on the center of the M4 feed ramp. In many cases it would not even fully extract. When the gun did cycle, it was also short stroking big time and was nowhere near approaching the point where it would lock back on the magazine. Problems? I had problems. Surprisingly the only problem I did not have was detonation. Many have noted that you need a special firing pin, but at least with this standard Mil-Spec lower trigger, there were no detonation issues.
After the first time out, I realized the gun was way, way, way under gassed, with a far too small barrel gas port hole, I also needed a dedicated AR-15 7.62×39 magazine for testing and needed some work on the barrel’s feed ramps.
Many range trips later (test, fail, tinker, and repeat), I had polished the feed ramps to a mirror finish and drilled out the barrel gas port to a huge 1/8 (.125″) size, and suddenly the gun was locking back and at least trying valiantly to pick up the next round in the magazine. Jam city, even with the C-Products dedicated 7.62×39 magazine feeding FMJ, but I really could not fault the magazine. There was more wrong here than magazine issues and what my aggressive feed ramp polish would resolve. That split feed ramp was an issue.
What I found was that most people had figured out the gas port size problem, but feeding was always an issue, and I saw only one company address it completely and that was Bushmaster. Bushmaster offered a 7.62×39 rifle, and from all accounts, it fed and functioned like a dream. The main design difference in these rifles were oversized gas ports and a single large feed ramp, which in essence removed the split between the M4 feedramps to just form one giant ramp.
This made sense because, due to the tapered case of the AK47 round. The round would angle toward the center of the feed ramp when the bolt attempted to pick it up, and guess what is in the middle. Yep, the split in the middle of the M4 feed ramps. So, I whipped out the Dremel and got to grinding away the split. Sure, I took a couple deep breaths before I basically trashed a perfectly good barrel extension, but in my mind it had to be done. It worked perfectly. In fact, now I can feed this upper with pretty much any magazine, but the C-Products dedicated 7.62×39 magazines delivered the best high capacity performance. I would expect any unmodified Stoner and ACS clone 7.62×39 magazines to deliver the same performance.
I have now put twenty full mags through this upper, running on a variety of lower receivers (including the WMD Guns Beast lower) and it has performed outstandingly. In fact, I have had zero functional issues in those 600 rounds other than the very occasional bad round, which is expected with inexpensive ammo.
Why Has Someone Not Figured This Out Before?
Well they have. Bushmaster did, but it was not very popular, leading them to discontinue it. From what I can tell, the single large feed ramp idea died with the discontinued product line. The major problems are that the gas port sizes are almost always too small for the 7.62×39 round and that the split M4 feed ramps only cause jams. If barrel manufacturers delivered a single large feed ramp and 1/8″ gas port hole in the barrel, almost all the issues would be resolved. Add in some dedicated 7.62×39 magazines and you are good to go.
If you have feeding issues, Dremel out the middle of the M4 feed ramp, and it’s likely any feeding issues you are having will disappear. If your bolt is not locking back on the last round, you probably need a larger gas port. In my case I needed to enlarge mine to 1/8″, but you might be able to get away with a smaller port, depending on your build. This process is as simple as removing the gas block and then carefully drilling out the gas port hole to a larger size. I would start smaller and slowly increase the size.
Final Thoughts
Apparently, there are many people who have been able to just buy working 7.62×39 uppers, slam in a dedicated 7.62×39 magazine, and start rocking the round, but the vast majority of folks have issues of some sort. Hopefully, my tips and modifications will allow you to build and enjoy a problem-free AR-15 7.62×39 upper and save some cash in the process as you enjoy a cheaper to shoot AK-47 round. Next up? How about a 7.62×39 AR-15 pistol build.
Sources
300 black out was designed to cure the feeding issues of 7.62x39. Basically same ballistics. Definitely not cheep but more affordable you roll your own. A Nish round made more to supplement suppressors. 7.62x39 seems that the mags were more the issue and their feeding angles. There are better mags and specifically made upper now that have fixed most the problems.
All that said I’m not hating on 7.62x39. It has normally been very affordable. Love feeding it in my combloc platforms. Liked it even more before the Biden Russia ban when its prices hadn’t surged.
Never had an urge to have an AR in that category. Now an AK in 5.56 I do like. Never got on the 5.45x39 but the 556 is close. Nothing against it, just didn’t want another round to buy and I kind of foresaw it’s fate in the distant future if Democrats blocked it. As Obamanation did, just like the Biden ban of cheep Russian 7.62.
The CMMG MK47 is about as good as it gets in my opinion for those who want an “AR” but shoot 762X39. However, a tubed and customized AK done the right way is an amazing and VERY soft shooting rifle.
No problems running steal case in mine, cycles fine.
I built a 16" budget build, and after enlarging my gas port a small amount and getting a 7.62 x 39 firing pin, it now runs good, good accuracy with a 1-4 LPVO . I wish I could find some Tula154gr softpoint ammo to try. I have dies and want to try a heavy bullet subsonic recipe with .303 diameter cast 200gr
I "built" an AR pistol in 7.62x39 from a kit after the ban expired. It wouldn't cycle reliably on Wolf, but was fine on Barnaul blue box and some russian SP rounds as well as Rem SP and FMJ. I had no issues feeding from the plastic MWS 10 rd magazines, but the metal mags from any mfr would not feed right when loaded with more than 10-12 rounds. To include both the original and improved C-Products 7.62x39 mags. It was a great plinker, and had surprisingly decent accuracy, but was always held back by the feeding issues with the higher capacity mags.
I do agree about the single vs twin feed ramps, that's the way to do it.
I do agree about the single vs twin feed ramps, that's the way to do it.
I'd be most interested in your experiences building 7.62x39 Pistols. I've finished one and have three more in process that are driving me to distraction. [[email protected] ] Sandpoint, IdahoMaking An AR-15 in 7.62×39 Work Reliably
Posted November 25, 2014 in DIY, Hunting, Shooting by Major Pandemic with No Comments
Running the 7.62×39 in the AR-15 platform has gotten somewhat of a bad rap. Read through forums and you would think people are a little bi-polar, with one post saying they could never get it to work and the next post noting they bought one off the shelf or built one and never had an issue. Kinda like people who love or hate the 300 Blackout.
Just as I was a fan of the previously cheap-to-shoot 5.45×39 round, I am a fan of the now cheap 7.62×39 round. Prices on that 5.45×39 round shot up a bit after they prevented cheap import surplus rounds, but the 7.62×39 round is still cheap and has been even through the great ammo crisis of the last ten years. I am not kidding. I could actually walk into Cabelas and buy whatever quality I wanted of $6 per 20 boxes of steel cased AK-47 rounds.
I have a lot of time behind my AK-47 at this point thanks to 7.62×39 ammo availability. Currently, I am seeing that the venerable 7.62×39 round is still consistently 20%+ less expensive than .223 for plinking rounds. My thought was, “Why not complete a build that could save enough money on the first 2,000 rounds to pay for the entire 7.62×39 AR-15 upper?
Why A 7.62X39 AR-15 Upper?
Some people will ask why you would ever want a 7.62×39 AR-15 upper. Beyond the cost savings, the 7.62×39 is actually a more versatile round in many respects than the 5.56 Nato round and has proven itself as a better deer and hog round by AK-47 hunters. Heck, the 7.62×39 round is basically just an up-powered 30-30 round, which is arguably the most successful deer hunting round in America. The 7.62×39 delivers more energy than the 5.56 Nato/.223 Remington or 300 Blackout out to the 200 yard mark, which is where over 95% of training, plinking, defensive, and hunting shooting is done.
Many will say why not just use the 300 Blackout? Well, from my experience the 300 Blackout round shares many of the same functional reliability problems as the 7.62×39 round running in an AR-15 unless either caliber are well tuned. Yes, yes, I know your 300 BO rifle runs great, but mine needed tuning to run both subsonic and high velocity rounds. Then there’s the fact that the 300 Blackout is still $1.00 a round compared to $0.40 per .223 round and $0.30 per 7.62×39 round. The 300 Blackout has its place, but a working AR-15 7.62×39 upper can deliver more power for less money–you know, if you can get it working.
Major Functioning Issues Of The 7.62X39 In An AR-15
The most significant problem with the AR-15 format running AK-47 ammo has been feeding and functioning. There have been a lot of theories on what exactly is needed to make the round run in the AR-15, but usually it seems to come down to recommendations to start cutting on magazines. I don’t think magazines alone are the culprits. I wanted to see if I could figure it out for you and in the process have some fun with this awesome round.
Every possible problem I could have had with this build, I experienced. Nothing came easy. I placed an order with Delta Team Tactical for a $139 16” 7.62×39 Melonite Barrel with a Carbine length gas system and their complete $139 7.62×39 Phosphate Bolt Carrier Group. Although inexpensive and high quality products, the company could not have screwed up my order more if had been somehow intentional. A month later, I was still working through them sending me the wrong thing–again. Problems were eventually resolved.
I plugged the barrel in a Anderson Manufacturing blemished $40 upper and then used a new Parallax Tactical M-Lock forend. The only real high dollar components on the upper were a Fortis gas block and a Lantac Dragon comp to take the bite out of the heavier recoiling round. A Lucid red dot topped the upper, but it would be months before I was able to really get to using it. For the majority of testing I used my WMD Beast lower.
Getting The 7.62X39 To Work In An AR-15
Once assembled, I ran to the range, excited to function test the build. Testing centered around the inexpensive ammo, with a couple steel cased Wolf and Cabelas Herter’s 7.62×39 rounds using Magpul Pmags and some C-product 6.8 SPC mags, which some had noted would work just fine if used with just a few rounds. They didn’t.
The upper would not feed more than one round at a time and even then seemed to jam the first round on the center of the M4 feed ramp. In many cases it would not even fully extract. When the gun did cycle, it was also short stroking big time and was nowhere near approaching the point where it would lock back on the magazine. Problems? I had problems. Surprisingly the only problem I did not have was detonation. Many have noted that you need a special firing pin, but at least with this standard Mil-Spec lower trigger, there were no detonation issues.
After the first time out, I realized the gun was way, way, way under gassed, with a far too small barrel gas port hole, I also needed a dedicated AR-15 7.62×39 magazine for testing and needed some work on the barrel’s feed ramps.
Many range trips later (test, fail, tinker, and repeat), I had polished the feed ramps to a mirror finish and drilled out the barrel gas port to a huge 1/8 (.125″) size, and suddenly the gun was locking back and at least trying valiantly to pick up the next round in the magazine. Jam city, even with the C-Products dedicated 7.62×39 magazine feeding FMJ, but I really could not fault the magazine. There was more wrong here than magazine issues and what my aggressive feed ramp polish would resolve. That split feed ramp was an issue.
What I found was that most people had figured out the gas port size problem, but feeding was always an issue, and I saw only one company address it completely and that was Bushmaster. Bushmaster offered a 7.62×39 rifle, and from all accounts, it fed and functioned like a dream. The main design difference in these rifles were oversized gas ports and a single large feed ramp, which in essence removed the split between the M4 feedramps to just form one giant ramp.
This made sense because, due to the tapered case of the AK47 round. The round would angle toward the center of the feed ramp when the bolt attempted to pick it up, and guess what is in the middle. Yep, the split in the middle of the M4 feed ramps. So, I whipped out the Dremel and got to grinding away the split. Sure, I took a couple deep breaths before I basically trashed a perfectly good barrel extension, but in my mind it had to be done. It worked perfectly. In fact, now I can feed this upper with pretty much any magazine, but the C-Products dedicated 7.62×39 magazines delivered the best high capacity performance. I would expect any unmodified Stoner and ACS clone 7.62×39 magazines to deliver the same performance.
I have now put twenty full mags through this upper, running on a variety of lower receivers (including the WMD Guns Beast lower) and it has performed outstandingly. In fact, I have had zero functional issues in those 600 rounds other than the very occasional bad round, which is expected with inexpensive ammo.
Why Has Someone Not Figured This Out Before?
Well they have. Bushmaster did, but it was not very popular, leading them to discontinue it. From what I can tell, the single large feed ramp idea died with the discontinued product line. The major problems are that the gas port sizes are almost always too small for the 7.62×39 round and that the split M4 feed ramps only cause jams. If barrel manufacturers delivered a single large feed ramp and 1/8″ gas port hole in the barrel, almost all the issues would be resolved. Add in some dedicated 7.62×39 magazines and you are good to go.
If you have feeding issues, Dremel out the middle of the M4 feed ramp, and it’s likely any feeding issues you are having will disappear. If your bolt is not locking back on the last round, you probably need a larger gas port. In my case I needed to enlarge mine to 1/8″, but you might be able to get away with a smaller port, depending on your build. This process is as simple as removing the gas block and then carefully drilling out the gas port hole to a larger size. I would start smaller and slowly increase the size.
Final Thoughts
Apparently, there are many people who have been able to just buy working 7.62×39 uppers, slam in a dedicated 7.62×39 magazine, and start rocking the round, but the vast majority of folks have issues of some sort. Hopefully, my tips and modifications will allow you to build and enjoy a problem-free AR-15 7.62×39 upper and save some cash in the process as you enjoy a cheaper to shoot AK-47 round. Next up? How about a 7.62×39 AR-15 pistol build.
Sources
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