CMMG MK4 PDW .300 Blackout Upper
In stock at Cabelas
CMMG's MK4 PDW .300 Blackout Upper quickly attaches to your AR-15 lower receiver. Equipped with the RKM7 KeyMod free-floating handguard. Nitride 4140 CrMo steel 8" barrel has a 1:7 rate-of-twist rifling for consistent shot placement. Upper forged 7075-T6 AL M4-type receiver. Pistol gas-port location. Made in USA.
Note: Upper used on rifle lower receiver must be accompanied with approved NFA paperwork showing legal possession of short barrel rifle.
RKM7 KeyMod free-floating handguard
Nitride 4140 CrMo steel 8" barrel has a 1:7 rate-of-twist rifling