CMMG Resolute MK4 Upper Receiver .350 Legend 16.1" – AR-15 Platform

The CMMG Resolute MK4 upper receiver assembly is chambered in .350 Legend and built for AR-15 platform lowers. This 16.1-inch barreled upper delivers straight-wall cartridge performance for hunting in restricted zones while maintaining familiar AR ergonomics and manual of arms. The .350 Legend chambering provides effective terminal ballistics on medium game at typical hunting distances.

Constructed with a mil-spec upper receiver and medium-taper barrel profile, this assembly features a black finish for corrosion resistance. The Resolute configuration includes CMMG's RML15 M-LOK handguard for accessory mounting. This is a complete upper assembly ready to mate with any mil-spec AR-15 lower receiver. No additional components required for installation—simply push the takedown pins. Verify compatibility with .350 Legend magazines and ensure your lower receiver can accept the required bolt carrier group.

• Caliber: .350 Legend
• Type: Complete Upper Receiver Assembly
• Compatible Lower: AR-15 / Mil-Spec
• Barrel Length: 16.1 inches
• Material: Mil-Spec Upper Receiver
• Finish: Black
• Includes: Complete upper with handguard, bolt carrier group, charging handle
• Installation: Drop-in to any mil-spec AR-15 lower