This video provides a practical guide on converting a 5.56/.223 AR-15 rifle into a 9mm Pistol Caliber Carbine (PCC). Brownells Gun Tech Steve Ostrem details the necessary modifications, including replacing the barrel with an "AR-9" specific barrel designed for blowback operation (no gas port or locking lugs). He also explains the need for a heavier bolt/carrier assembly and buffer, while noting compatibility with a standard carbine spring. The video highlights the requirement for a new muzzle device with a larger exit hole and importantly, a magazine well conversion unit from brands like American Tactical, Hahn Precision, or Stern Defense, to accommodate various pistol magazines (Colt SMG, Glock, etc.). The process concludes with assembly, a headspace check, and a range test.
This video features Brownells Gun Tech Steve Ostrem discussing AR-15 buffer weights and their applications in various AR-15 builds. He covers a range of buffer types, from standard carbine buffers to heavy pistol recoil buffers. Specific products mentioned include the Colt Carbine H2 Heavy Buffer, Hahn Precision AR-15/M16 Pistol Cartridge Recoil Buffer, Rock River Arms AR-15 Carbine Buffer, Geissele Super 42 Tungsten Buffer Weigh, and DPMS AR-15/M16 Heavy Buffers. The video aims to educate viewers on how buffer weights affect firearm function and recoil management.
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