• Thick-wall Forged Upper receiver
• Heat & cryogenically treated, stress relieved & aged twice
• Bore coated with dry film lube over the anodize
• M4 feed ramps
• AR15/M16 Compatible
• Without Forward Assist

VLTOR's MUR-1S upper receivers are arguably the strongest and most dimensionally correct upper receivers on the market. MUR uppers are forged as opposed to lesser quality billet manufactured uppers. There are many factors that contribute to the MUR being a superior upper receiver.  Although the MUR adheres to mil-spec, its walls are thicker than the standard receiver. The MUR manufacturing process starts with 7075 Aircraft-grade aluminum forging. During the forging process, the MUR is stress relieved, heat treated then subjected to VLTOR's proprietary cryogenic process.  The result is a stronger, more rigid upper receiver which translates into a more accurate weapon. The MUR is the top choice for multi-caliber AR builds including 5.56/.223, 6.8 SPC, 6.5 Grendel, 300 Blackout/Whisper and 204 Ruger. If you are looking for a superior upper receiver with forward assist, please check out the MUR-1A.

VLTOR MUR-1S Upper Receiver without Forward Assist 

For more info, visit VLTOR