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The Range
Rifle & Shotgun Discussion
New lightweight AR-15 project
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<blockquote data-quote="NikatKimber" data-source="post: 3016820" data-attributes="member: 423"><p>I was fascinated by [USER=7292]@doctorjj[/USER] 's featherweight build <a href="https://www.okshooters.com/threads/high-end-ar-15-if-you-had-1-choice.233297/page-2#post-29123463" target="_blank">HERE</a>, so I decided to build a lightweight myself. Now I don't have the budget he did for the sweet exotic parts, so I took a different aim: What can I do on a budget for a lightweight build, and still maintain low recoil? Sounds contradictory, but I thought if I use a LW buffer & BCG, along with an adjustable gas block and muzzle brake, that should keep it fun to shoot.</p><p></p><p>I will try and get some pictures of part weights up once I weigh them all, but my goal is 5lbs unloaded with optic (5.5lbs loaded with 20rd mag). I will also put up a detailed cost sheet.</p><p></p><p>Right now I have a standard AR-15 forged lower, and a <a href="http://palmettostatearmory.com/psa-ar15-slick-sided-upper-receiver.html" target="_blank">PSA slick sided forged upper </a>(one of the lightest uppers I've found). I plan on milling a groove down the length of the pic rail on top like some of the high end LW uppers. I also plan to use one of the <a href="http://www.tnarmsco.com/ar15-hybrid-polymer-lower/" target="_blank">Tennessee Arms hybrid polymer lowers</a>, but I have the forged lower already.</p><p></p><p>The barrel is a <a href="http://www.primaryarms.com/B223WMLW1618-P" target="_blank">Bear Creek Arsenal 16" mid lightweight </a>with .750" gas block seat. I needed the .750" seat since I had a .750" adjustable lopro gas block in my parts bin.</p><p></p><p>For the stock I am using an rifle buffer system, with just the A2 buttplate screwed directly to the tube. I also removed the trap door. This means I will have to tap the hole for the takedown detent & spring since there will be no stock or plate to retain it. I also removed all of the tungsten weights from the buffer.</p><p></p><p>I snagged a super cheap M16 BCG from Primary Arms also (BCA for $60), and plan on milling on it to shed a couple ounces.</p><p></p><p>The handguard is this <a href="https://www.deltateamtactical.com/Carbon-fiber-Free-Float-Hand-Guard-12-Rifle-length-_p_4182.html" target="_blank">Delta Team Carbon Fiber 12"</a> model. It is $60. I was going to grab the 9" for $50, but my buddy had bought this and didn't care for it in his application so I am trying it out for this. I'll keep this updated if I decide to ditch it also.</p><p></p><p>Before any "buy quality parts" or "this won't be reliable when shooting underwater in the sand while operating operationally in theatre"... I know, this is a fun project to be a range toy. If parts don't work for even that, I'll upgrade as necessary and update here. It also won't likely be a high round count gun.</p></blockquote><p></p>
[QUOTE="NikatKimber, post: 3016820, member: 423"] I was fascinated by [USER=7292]@doctorjj[/USER] 's featherweight build [URL='https://www.okshooters.com/threads/high-end-ar-15-if-you-had-1-choice.233297/page-2#post-29123463']HERE[/URL], so I decided to build a lightweight myself. Now I don't have the budget he did for the sweet exotic parts, so I took a different aim: What can I do on a budget for a lightweight build, and still maintain low recoil? Sounds contradictory, but I thought if I use a LW buffer & BCG, along with an adjustable gas block and muzzle brake, that should keep it fun to shoot. I will try and get some pictures of part weights up once I weigh them all, but my goal is 5lbs unloaded with optic (5.5lbs loaded with 20rd mag). I will also put up a detailed cost sheet. Right now I have a standard AR-15 forged lower, and a [URL='http://palmettostatearmory.com/psa-ar15-slick-sided-upper-receiver.html']PSA slick sided forged upper [/URL](one of the lightest uppers I've found). I plan on milling a groove down the length of the pic rail on top like some of the high end LW uppers. I also plan to use one of the [URL='http://www.tnarmsco.com/ar15-hybrid-polymer-lower/']Tennessee Arms hybrid polymer lowers[/URL], but I have the forged lower already. The barrel is a [URL='http://www.primaryarms.com/B223WMLW1618-P']Bear Creek Arsenal 16" mid lightweight [/URL]with .750" gas block seat. I needed the .750" seat since I had a .750" adjustable lopro gas block in my parts bin. For the stock I am using an rifle buffer system, with just the A2 buttplate screwed directly to the tube. I also removed the trap door. This means I will have to tap the hole for the takedown detent & spring since there will be no stock or plate to retain it. I also removed all of the tungsten weights from the buffer. I snagged a super cheap M16 BCG from Primary Arms also (BCA for $60), and plan on milling on it to shed a couple ounces. The handguard is this [URL='https://www.deltateamtactical.com/Carbon-fiber-Free-Float-Hand-Guard-12-Rifle-length-_p_4182.html']Delta Team Carbon Fiber 12"[/URL] model. It is $60. I was going to grab the 9" for $50, but my buddy had bought this and didn't care for it in his application so I am trying it out for this. I'll keep this updated if I decide to ditch it also. Before any "buy quality parts" or "this won't be reliable when shooting underwater in the sand while operating operationally in theatre"... I know, this is a fun project to be a range toy. If parts don't work for even that, I'll upgrade as necessary and update here. It also won't likely be a high round count gun. [/QUOTE]
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