- Thick-wall forged upper receiver
- Heat & cryogenically treated, stress relieved & aged twice
- Bore coated with dry lube over the anodize
- M4 feed ramps
- With Forward Assist
- AR15/M16 Compatible
VLTOR's MUR-1A upper receivers are arguably the strongest and most dimensionally correct upper receivers on the market. MUR (Modular Upper Receiver) uppers are forged as opposed to 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 without forward assist, please check out the MUR-1S.
For more info, visit VLTOR