The FightLite MCR (Mission Configurable Rifle) DF Upper (brand part no. MCR060MS) is a belt-fed-capable 5.56 upper receiver assembly with a 12.5-inch barrel and an M-LOK handguard. It interchanges with standard AR/M4-pattern uppers and fits any mil-spec lower receiver without permanent modification, and FightLite designed it to be rearward compatible with AR15/M16-pattern lowers dating back to 1963.

Key Specifications

• Chambered in .223 Remington/5.56 NATO.
• Barrel measures 12.5 inches.
• Belt-fed-capable upper receiver assembly using FightLite’s MCR technology.
• Interchanges with standard AR/M4 uppers and fits any mil-spec lower without permanent modification.
• Rearward compatible with AR15/M16-pattern lowers dating back to 1963.
• Fitted with an M-LOK handguard.
• DF designation identifies the Dry Film-treated variant.

Frequently Asked Questions

Does this upper fire full-auto? No, this is a semi-automatic upper receiver assembly; fire control is determined entirely by the host mil-spec lower it is mounted on.

Will this fit my existing AR-15 lower? Yes, it is designed to fit any mil-spec lower receiver without permanent modification.

Buy the FightLite MCR 5.56 Belt-Fed-Capable Upper

Reconfiguring an AR-pattern rifle for belt-fed operation used to mean a dedicated firearm, and FightLite’s MCR technology brings that flexibility to a standard mil-spec lower instead. Browse more AR15 uppers from FightLite and order it from our Lubbock, Texas gun shop as soon as it’s ready to ship.