CMMG Resolute MK4 350 Legend 16.1" M-LOK Free-Float Complete Upper - Armor Black

The CMMG Resolute MK4 is a complete upper assembly chambered in .350 Legend and built on CMMG's proven Mk4 AR-15 platform. Designed to drop onto any standard mil-spec AR-15 lower receiver group, this upper lets you build a straight-walled hunting or defensive carbine around the fast, low-recoil 350 Legend cartridge without buying a complete rifle.

At the heart of the assembly is a 16.1" medium-taper barrel with a 1:16 twist rate specifically chosen to stabilize the wide, straight-walled 350 Legend bullet. The barrel is paired with CMMG's EML 15 M-LOK free-float handguard, giving the shooter a rigid, lightweight platform with M-LOK attachment slots at the 3, 6, and 9 o'clock positions for lights, lasers, bipods, and other accessories. Both the upper receiver and handguard wear a rugged Armor Black finish for a low-glare, hard-use appearance suited to field, range, and defensive roles.

Because this is a complete upper group only, no lower receiver is included. It is intended to mate with any mil-spec AR-15 lower, giving builders and hunters a flexible way to add a 350 Legend option to an existing collection. Additional 350 Legend magazines are available separately in 5-round and 10-round configurations to comply with straight-walled cartridge hunting regulations in restricted states.