CMMG 8" Barrel and BCG Kit 5.7x28mm

CMMG 8" Barrel and BCG Kit 5.7x28mm The CMMG 8" Barrel and BCG Kit 5.7x28mm is a high-quality kit with many features that make it a popular choice for gun enthusiasts. The kit includes an 8" 5.7x28mm barrel and a 5.7x28mm bolt carrier group, both of which feature a durable Black Nitride finish. The Radial Delayed Blowback operating system provides less felt recoil than a straight blowback system and still allows for last-round bolt hold open, making it an ideal choice for AR pistols or SBRs. The kit is designed to be assembled into an Mk4/mil-spec AR15 upper and can work with either a CMMG Mk57 lower receiver or an Mk4/AR15 mil-spec lower receiver when using CMMG 5.7 AR Conversion Magazines. The CMMG 8" Barrel and BCG Kit 5.7x28mm is a reliable and high-performing kit perfect for building a quality AR pistol or SBR. Features: 8" 5.7x28mm Barrel 5.7x28mm Bolt Carrier Group Black All NFA/ATF Rules Apply You may use this AR 15 barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when installed on a Pistol configuration firearm. Check your local laws and jurisdictions.