Product Features & Specifications

CMMG 55BB40BMB Resolute MK4 5.56x45mm NATO 16.10", Midnight Bronze, M-LOK Free-Float Handguard for AR-Platform (No BCG or Charging Handle)

Top off your next build with this RESOLUTE Mk4 Upper Group. Chambered, this upper group is a staple for any collection and comes ready to pair with the AR15 lower group of your choice.

Brand	CMMG
Category	Uppers
Series	MK4
Model	Resolute
Caliber	5.56x45mm
Barrel Length Range	16" to 16.99"
Firearm Fit	AR-Platform
Gun Platform	AR-Style
Firearm Type	AR Platform
Handguards	M-LOK Free-Float
Thread Pattern	1 / 2"x28
Barrel Length	16.10"
Receiver Finish	Midnight Bronze
Handguard Finish	Midnight Bronze