- .300 AAC Blackout caliber
- 12.5″ barrel
- Direct impingement operating system
- 4140CM, SBN barrel material
- Pistol gas port location
- Cmmg EML11 M-lok hand guard
- Mk4 Zeroed parts and accessories – Quality comes standard
- Cerakote standard finish
- Lifetime Quality Guarantee
Designed from day one for the AR15 platform, 300BLK was made to utilize many of the most common AR components in existence. With the Cmmg Banshee Mk4 300BLK 12.5″ Upper Group (30B8A6F) you can build your next 300BLK AR with character like no other.
Available in different Cerakote finishes, all Cmmg Upper Groups come complete with bolt carrier group and ZEROED accessories including: Zeroed AR15 Polymer Dust Cover, ZEROED AR15 Ambi Charging Handle, ZEROED Linear Compensator .308 Win.
