OSA - 17 Design Lowers - Completed Builds Thread

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rswink

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I sent that to the wife, she is building a 5.56 out of a lower. The other 2 I bought are for hunting. She is looking at 300BO and I am looking for 450BM

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undeg01

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I built the last of my OSA lowers.

Aero upper with Aero bolt. CMMG LPK with polished trigger and JP Enhanced spring kit. 20” bull barrel in 223 Wylde w/17” rail. Topped with a 6X24X50 Bushnell Elite Tactical scope sitting in a Burris QD mount. Maybe overkill on the optics side, but I had the mount and scope just sitting in the safe anyway.

Should be a hell of a prairie dog rifle and paper puncher.

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B96brig4CC

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Here is mine. Picked up a blem lower from the drawing that Darren had last weekend. Built it out today. Anderson LPK w/ stainless trigger group
BCM Grip and trigger guard
PSA 10.5” complete upper w/ FN HF 556 1/7 twist barrel
PSA BCG
BCM gunfighter charging handle
BCM m-loc rail covers
BCM forward grip
KAK industries 9” pistol buffer tube
Primary Arms red dot( will likely go to Holosun once I purchase a LVPO for my rifle.)

everything fits nicely on this lower. The only blemishes I could find was on the inner threads for the buffer tube, but they didn’t have burrs and the tube went on just fine. Really happy with the build quality.

before someone says anything, this is a firearm. Not a pistol and not a rifle. OAL is 26 1/2” inches from end of buffer tube to end of barrel.

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dlbleak

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View attachment 210307 Here is mine. Picked up a blem lower from the drawing that Darren had last weekend. Built it out today. Anderson LPK w/ stainless trigger group
BCM Grip and trigger guard
PSA 10.5” complete upper w/ FN HF 556 1/7 twist barrel
PSA BCG
BCM gunfighter charging handle
BCM m-loc rail covers
BCM forward grip
KAK industries 9” pistol buffer tube
Primary Arms red dot( will likely go to Holosun once I purchase a LVPO for my rifle.)

everything fits nicely on this lower. The only blemishes I could find was on the inner threads for the buffer tube, but they didn’t have burrs and the tube went on just fine. Really happy with the build quality.

before someone says anything, this is a firearm. Not a pistol and not a rifle. OAL is 26 1/2” inches from end of buffer tube to end of barrel.

View attachment 210306
Bart, those weren’t supposed to be blems. I take it everything went ok with it though?
 

B96brig4CC

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Bart, those weren’t supposed to be blems. I take it everything went ok with it though?

I guess I misunderstood the post about them. I looked and looked thinking it was, but for the life of me couldn’t find anything. There were 2 spots that the threads for the buffer tube weren’t coated, but the threads themselves were fine. Everything fit great. Very pleased with it and glad to have gotten one.


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