CMMG R.D.B. Barrel and BCG Kit, 4140CM, SBN, 9mm - 5", 8", 16"
CMMG
$405.00 - $450.00
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CMMG
CMMG R.D.B. Barrel and BCG Kit, 4140CM, SBN, 9mm - 5", 8", 16"
CMMG's 9mm Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using our 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.
Our Barrel and Bolt Kits are designed to work exclusively with mil-spec AR-15 upper receivers with a modified ejection port, like our Mk4 upper, and most mil-spec AR15 lowers when used with 9 AR Conversion mags as well as our MkGs Mk17 and Mk9* lowers. Other manufacturers’ receivers may work, but we cannot guarantee function or reliability.
*Older Mk9 lowers will require one of our retrofit kits to convert it to a Radial Delayed Blowback compatible lower, instead of Traditional Blowback.
All CMMG products come with our Lifetime Quality Guarantee.
Medium Taper
1:10 Twist
4140 Chrome Moly
Salt Bath Nitride Finish inside and out
9×19 NATO Chamber
Threaded 1/2-28
Radial Delayed Blowback Bolt (Patent Pending)
Requires enlarged ejection port for reliable operation.
Weight: 1.7lbs
