CMMG MK4T Upper 300 AAC Blackout 16" Stainless Barrel Fits AR Flat Top A2 Brake Chokes RKM11 KeyMod Handguard

CMMG's complete rifles and uppers are undoubtedly some of the finest in the industry. This particular complete upper, chambered in the popular 300 AAC Blackout, features a stainless steel barrel and standard flat top upper receiver. The free floating Keymod handguard provides excellent accuracy and nearly unlimited modularity. A mil spec bolt carrier group and charging handle are also included, as well as a standard A2 flash hider.



CMMG MK4T Upper 300 AAC Blackout 16" Black CMMG RKM11 KeyMod hand guard Stainless A2 Flat Top AR Rifles 30BC353
Manufacturer: CMMG
Mfg Number: 30BC353

Enter your ZIP code for an exact shipping cost on this item. Hazardous-materials fees, where they apply, are included in the total shown.

Read our full shipping policy

Firearms must ship to a licensed dealer (FFL), who completes the transfer and the required background check when you collect the item.

How FFL transfers work · Terms of sale · Product and legal restrictions