This BCA AR-15 complete 12.7x42 rifle length upper has a 10.5" parkerized Heavy barrel, and features a 1:20 twist rate, with a pistol length gas system. It includes a 9.5" MLOK Rail, an M4 flat-top billet upper receiver, a BCA AR15 bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 12.7x42 is compatible with any mil-spec AR-15 lower.
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Magazine not included. Check out Magazines here!
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||49/64 x 20|
|Caliber||12.7 x 42|
|Feed Ramp||Single Feedramp|
|Gas System||Pistol Length|
|Gas Block System||0.936|
|Charging Style||Right Side Charging|
|Classification||Complete Upper Assembly|
What magazine/ammo does BCA recommend for each caliber?
These are brands that BCA uses in the facility to test fire our products. However, there are several brands that will also function properly. Caliber Magazine Ammo Grain Weight Ammo Brands BCA Status AR15 - 223/5...