Hawk451 2,230 Posted November 2, 2015 Report Share Posted November 2, 2015 Got out out the range today to test 10.5" AR pistol build. Seems to work OK for the most part. More on that in a bit. New toy & 'old reliable". Tactical Machining gen2 80% lower, Anderson upper & BCG, AR/Stoner 10.5" 1:7 melonite coated barrel, AR Gold trigger, PSA combo UPK/LPK, Matrix Arms Victor hand guard, I forget buffer assy, Eotech & Ruger polymer BUIS, DPMS A2 flash hider. Testing at 100 yards in gusty conditions. (probably 15-25 mph, with a twisty arroyo on one side & ridge on the other, it's not uncommon to have direct headwind at target, full-value crosswind at 50 yards & direct tailwind at firing position. oy...) Had 1 each FTF with PPU & Fiocchi 55gr SPs. Fiocchi also failed to lock bolt back on last shot. Brass was dribbling out about 2-1/2' @ 0300. Furthest was about 7' @ 0400 with Federal fusion 62 gr BTSP, which turned in best 2 groups of 2-7/8" & 3-1/16". (Forgot to take camera & calipers, argh.) I suspect that it may be borderline under-gassed. Carbine length system, gas port looked about .065-.070", set gasblock at about 1/16'" fwd of shoulder. May have to fit a KX5. Worked just dandy with cheap wallyworld Federal bulkpack, Perfecta 55 gr FMJ & Wolf Gold 55 gr FMJ. Groups ranged from 4-1/2" with bulkpack, 4" with Perfect & 3-3/4" with Wolf. Velocities ran 100-125 fps faster than same loads out of PAP M85np. A real annoyance was that the best load tested for the AR (Fusion 62 gr) is the first ammo that has made my boringly reliable M85 experience a FTF. Will have to try some Federal powershock 55 gr, favorite for M85 in soft-points. Accuracy-wise, it's just barely better than the PAP. Intrinsic accuracy is easier to access via AR Gold trigger. Weight, with blubbery Eotech fitted & no sling yet is an ounce shy of 6 lbs, 33 ounces lighter than M85 with (8 ounces?!?) sling removed. Total round-count at this point is about 140. I'll get another couple hundred rounds through it & see if FTF & lockback issues are mitigated as the working parts get to know each other. Then strip it down, figure out recommended markings etching & finish. 8 Quote Link to post Share on other sites
storm6490 2,768 Posted November 2, 2015 Report Share Posted November 2, 2015 nice pistols! Quote Link to post Share on other sites
Hawk451 2,230 Posted November 16, 2015 Author Report Share Posted November 16, 2015 Well, got out to the range last week to test more factory loads. Pretty much broken-in now, earlier FTF & lockback failures all cleared up. Federal Powershok 55gr SPs & cheap [relatively speaking] PPU 75 gr BTHP both working reliably in AR & PAP and approaching 2 MOA in either. Got it painted now: avoided the 'kewl' camo scemes & went with ugly/funtional camo. Not a perfect matchfor my AO, but not bad... Rattle-can & sponge-daub technique. Needs more sand color, I think. 5 Quote Link to post Share on other sites
jmzzl 146 Posted November 22, 2015 Report Share Posted November 22, 2015 AR's don't get enough love here. Cool toy 1 Quote Link to post Share on other sites
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