Vltor Modular Upper Receiver with Bolt Assist and Shell Deflector

The MUR is a rigid Mil-Spec flat-top upper made to fit all AR15/M16 M4 rifles and carbines. The MUR was developed to give the customer a Mil-Spec correct upper receiver with a thicker wall, making the MUR upper receiver a stronger platform. This more rigid upper receiver will increase accuracy and reliability, while extending the life of the interfacing components. The MUR-1A model comes equipped with a shell deflector and forward assist. The MUR-1S comes with a one piece machined shell deflector unit which was updated to this piece in June of 2015. Aircraft-grade aluminum construction, 7075 Forging, stress relieved, heat treated, aged twice and cryogenic treated. Hard coat anodized, black per MIL-A-8625 TYPE III Class 2. Precision machined and finished by hand. Bore coated with dry film lube over the anodized surface. Compatible with all Mil-Spec AR-15 parts and accessories. Available with (MUR-1A) or without forward assist (MUR-1S). M4 feed ramp