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CMMG’s MkGs Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using their Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, our 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.
CMMG MkG Barrel and Bolt Kits are designed to work exclusively with their MkG Lowers, and a mil-spec upper receiver with enlarged ejection port. Other manufacturers’ receivers may work, but CMMG cannot guarantee function or reliability.

  • Barrels are 5″ Medium Taper or 8” 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: 1.4lbs(5”) and 1.7lbs(8”)

CMMG - AR-15 BARREL & BOLT CARRIER GROUP SETS 9MM

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2 Item(s)

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 9 mm Luger

Length: 5"

Barrel Weight: 1.4 lbs

Contour: Medium

Finish: Black

Muzzle Threads: 1/2-28, ...

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Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 9 mm Luger

Length: 8"

Barrel Weight: 1.7 lbs

Contour: Medium

Finish: Black

Muzzle Threads: 1/2-28, ...

click details to view more....