CMMG 99D517A Replacement Barrel Kit with Bolt Carrier Group, 9mm Luger 8 in Threaded, Black, Radial Delayed Blowback, Fits AR-Platform

CMMG's 9mm Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using CMMG's Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, RDB uses a bolt that is forced to rotate and unlock, slowing the BCG. This results in a lighter BCG for a lighter rifle, and less felt recoil than a straight blowback system. Their Barrel and Bolt Kits are designed to work exclusively with mil-spec AR-15 upper receivers with a modified ejection port, like their MkG/MkGs upper, and most mil-spec AR15 lowers when used with 9 AR Conversion mags as well as their MkGs Mk17 and Mk9* lowers. Other manufacturers receivers may work, but we cannot guarantee function or reliability.*Older Mk9 lowers will require one of their retrofit kits to convert it to a Radial Delayed Blowback compatible lower, instead of Traditional Blowback.

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Weight:	1.40 lbs
Firearm Fit:	AR-Platform
Color:	Black
Includes:	Bolt Carrier Group
Series:	Kit
Twist:	1:10"
Length Range:	6"-10"
Length:	8"
Material:	4140 Chromoly Steel
Model:	Replacement Barrel
Caliber:	9mm Luger
Thread Pattern:	1/2"x28
Finish:	Salt Bath Nitride