CMMG Resolute 100 Mk4 .22 Long Rifle AR-15 Upper Receiver 17″


For over a decade CMMG has remained committed to producing some of the best AR platform firearms in the industry. Get this CMMG Resolute 100 Mk4 AR-15 Upper Receiver from us for the best value online! We will have all your guns, knives, clothing, and accessories ready for the cheapest price so get them while you can with easy, fast shipping.

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ar 15 long rifle

Ar 15 long rifle The Resolute 100 Mk4 complete upper receiver assembly comes with everything you need to connect directly to an existing AR-15 lower receiver. This upper is designed to be compatible with Mil-spec pattern AR-15 lower receivers. Whether you like plinking for recreational shooting, need a reliable gun for varmint and pest control the Mk4 Resolute 100 complete upper receiver assembly from CMMG is the only upper you need.

The AR-STONER LR-308 A3 Billet Upper Receiver Assembly chambered in 308 Winchester is ready to be assembled to a complete lower and fired! This LR-308 billet upper features a mil-spec bolt carrier group, a heavy countour 18” barrel with a matte finish and lightweight, 15” free float M-Lok handguard. Securely mount popular accessories directly to the precision M-Lok cutouts. This sleek and ergonomic free float handguard meets shooters needs without sacrificing strength and performance. The AR-STONER LR-308 Upper is patterned after DPMS and will work with DPMS style parts/lowers. The A3 upper assembly comes complete with charging handle, forward assist, ejection port cover, flash hider, bolt and bolt carrier assembly. Supplied without sights, this upper is a great platform for a precision scope or iron sights (both sold separately).


  • Complete Bolt Carrier Group
  • 15″ M-Lok Handguard
  • 18” Barrel
  • Chambered in 308 Winchester
CMMG Resolute 100 Mk4 .22 Long Rifle AR-15 Upper Receiver 17″ %u200BSpecifications:
  • CMMG Inc. Resolute Mk4 AR-15 Complete Upper Receiver Assembly 22B83BC
  • Blowback System
  • .22 Long Rifle
  • 17″ 4140 Chrome-moly barrel with Salt Bath Nitride Finish
  • Medium Taper Profile Barrel
  • 1:16″ Twist Rate
  • Threaded 1/2×28
  • CMMG A2 Muzzle Device
  • Forged 7075-T6 Aluminum Upper Receiver
  • Complete Bolt Carrier Group
  • CMMG RML15 M-LOK Free Float Hand Guard
  • CMMG Anti-Jamb .22 Long Rifle Charging Handle
  • Overall Length 24.8″
  • Overall Weight 4lbs 1oz
  • Made In The USA
  • Hard Coat Anodized Finish
  • Black
  • Fits: Mil-Spec pattern AR-15 Lower Receivers


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