CMMG Resolute 57B40E4AB 5.7x28mm AR Carbine
CMMG Resolute 5.7x28mm 16.1" AR-platform upper receiver with free-float M-LOK handguard in Armor Black. Modern PDW ballistics in classic carbine form.
Modern Personal Defense in Carbine Form
The CMMG Resolute upper receiver brings contemporary personal defense ballistics to the proven AR-platform architecture. Chambered in 5.7x28mm, this 16.1" barrel delivers the velocity and terminal performance characteristics of a personal defense weapon while maintaining the ergonomics and handling qualities shooters expect from a modern carbine.
Key Features
- Caliber: 5.7x28mm — a modern personal defense round gaining popularity for its flat trajectory and reduced recoil
- Barrel Length: 16.1" optimizes velocity while maintaining a compact, maneuverable profile
- Free-Float M-LOK Handguard: Precision-machined for accuracy and equipped with M-LOK slots for mounting lights, lasers, and other tactical accessories
- Armor Black Finish: Durable, professional appearance that resists corrosion
- AR-Platform Compatible: Works with standard AR-15 lower receivers for familiar controls and ergonomics
Why This Matters
If you've been watching the evolution of personal defense calibers, you know 5.7x28mm offers genuine advantages: manageable recoil, flat shooting characteristics, and effective terminal ballistics in a compact package. The Resolute gives you those advantages without sacrificing the balance and handling of a traditional carbine. Whether you're building a home defense rifle, a truck gun, or exploring modern PDW concepts, this upper delivers serious capability in a platform you already understand.
