The Vltor Weapon Systems MUR Upper Receiver is a modular AR-15/M16 flattop upper designed with substantially thicker walls than a standard receiver to deliver a more rigid platform. Precision machined from fully heat-treated and cryogenically stress-relieved 7075-T6 aluminum, it provides enhanced stability, improved accuracy, longer service life, and reliable function for demanding shooters.

This complete upper receiver comes assembled with a true MIL-STD 1913 Picatinny rail featuring 13 cross slots, M4-style feed cuts, and pre-installed forward assist and ejection port door. Its matte black, hardcoat anodized finish with a dry-lube coating promotes smooth bolt carrier operation and added wear resistance. Ideal for building a quality AR-15 in 223 Remington for range use, training, or competition, the MUR Upper Receiver reflects Vltor’s reputation for thoughtful engineering and consistent craftsmanship.

• Manufacturer: VLTOR
• Model: MUR Upper Receiver (MUR-1A)
• Cartridge: 223 Remington
• Receiver Style: Complete, modular flattop upper
• Material: 7075-T6 Aluminum
• Rail: MIL-STD 1913 Picatinny with 13 cross slots
• Feed Cuts: M4-type