MISB CMMG AR Upper 5.7mm 12″ – $1950
- Caliber: 5.7×28
- Baffling: 6″
- Effective Rifling: 6″
- OAL Barrel: 12″
- Handguard: Aero Precision M-Lok
- Handguard Length: 9.3″
- Bolt Carrier Group: CMMG Radial Delay Blow Back System
- Utilizes standard AR-15 lower receivers and CMMG magazines