This Bear Creek Arsenal AR-15 18" heavy, parkerized 12.7x42 barrel has a mid-length gas system with a 1:20 twist . Our 12.7x42 parkerized rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. Use a Bear Creek Arsenal ar barrel in your AR15 next build and experience superior performance back by a lifetime warranty!
All finished barrels go through a 100% inspection process. Inspections Equipment includes CMMs and Air Gauges for the bores as well as visual and machine inspection.
Shop more 12.7 x 42 Barrels!
We recommend Defender 350 gr. ammo
Does not include gas block or gas tube
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||49/64 x 20|
|Caliber||12.7 x 42|
|Feed Ramp||Single Feedramp|
|Gas System||Mid Length|
|Gas Block System||0.936|
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...