CMMG MK4T SBN Upper Fits AR 223 Rem/5.56 NATO 16" Barrel A2 Brake Flat Top RKM11 KeyMod Handguard Black 55BC76A

CMMG MK4T Upper 223 Rem 556NATO 16" Black CMMG RKM11 KeyMod hand guard A2 Flat Top AR Rifles 55BC76A



CMMG is a leading manufacturer of AR-15 and AR-15 related accessories. CMMG's commitment to quality and creating product at the best value at the best price is unmatched. This complete upper receiver is designed to connect seamlessly with your existing AR-15 or AR-15 pattern lower receiver. For your convenience, a bolt carrier group is included and everything on this complete unit features a matte black finish.



Specifications :

- Caliber: 5.56mm NATO (accepts .223 Remington)

- Barrel: 16" 4140 Chrome-Moly steel medium taper profile

- Threaded 1/2x28

- RKM11 KeyMod hand guard

- Forged 7075-T6 Aluminum M4 Type Upper

- CMMG A2 Compensator

- Bolt carrier group

- Charging Handle

- Finish: Matte Black



Model: MK4T

Manufacturer: CMMG

Mfg Number: 55BC76A

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