The groundbreaking MCR (Mission
Configurable Rifle) belt-fed upper receiver assembly is designed to
interchange with standard AR/M4 type uppers and readily fits any
MIL-Spec lower receiver without permanent modification to the host
lower, and is rearward compatible to AR15/M16 models produced as early
as 1963. Once installed, the patented MCR upper receiver system can be
user-configured in seconds without tools to adapt to virtually any
mission profile. Specifically designed for responsible armed citizens,
law enforcement and professional security personnel who wish to upgrade
their rifle or carbine to MCR performance and capability; standard
features include gas-piston operation for extreme reliability in adverse
conditions; a 16.25" quick-change (3 seconds) barrel system and a MLOK
co-planar hand-guard with rail-interface system for the mounting of
optics and modern accessories.
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