The CMMG Mk4 T is a modular, value-focused AR-15 pattern rifle built around a KeyMod free-float handguard system and a 16 in .300 AAC Blackout barrel finished in Salt Bath Nitride. It’s designed for shooters who want a dependable base platform with solid build quality and straightforward compatibility with common accessories.
Key Features
16 in .300 AAC Blackout Salt Bath Nitride barrel for enhanced wear resistance
Black aluminum receiver construction for a durable, lightweight platform
KeyMod free-float handguard design for accessory mounting and stable handling
AR-15 pattern semi-automatic operation for familiar controls and parts compatibility
If you’re building or upgrading an AR-15 style .300 Blackout setup, the CMMG Mk4 T gives you a strong foundation with a nitride barrel and a modular handguard system.
