MF-50S (Single-Shot Upper Receiver)

McCutchen Firearms MF-50S Single-Shot .50 BMG Upper Receiver for AR-15 Rifles

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***PLEASE NOTE THAT SALES OF UPPER RECEIVERS ARE ON HOLD TEMPORARILY DUE TO A NEW ATF RULING. We are working expeditiously to resolve this issue and start selling again. If you would like to be notified when we start selling again, please send a message to: and we will notify you as soon as sales start again. Our complete rifles are at a new lower price and are in stock and available to ship today.
Our Price: $2,295.00

Availability: Usually Ships in 24 Hours
Product Code: MF-50S



Description Specifications What's Included
.50 BMG Upper Receiver Assembly, Single-Shot
MF-50S Features

  • Solid and Durable Upper Receiver Construction
    • 4140 steel billet
    • Single piece construction with integrated 0 degree scope rail and lugs
    • Electro-induction hardened
  • Unmatched Safety Features:
    • Proprietary Mechanically Assisted Pin Safety ("MAPS")
    • Integrated hammer drop safety
    • Gas bleed hole in breech
  • Keymod-compatible, 7075 aluminum billet handguard
  • Free-floating bull barrel
  • High volume 6-port gas brake or optional tank brake
  • Graphite Black Cerakote
  • Available with a choice of barrel options: 22" or 30"

.50 BMG Cleaning Rod Kit GG&G Heavy Duty XDS Bipod Complete Lower Assembly
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Our Price: $579.95

.50 BMG Cleaning Rod Kit GG&G Heavy Duty XDS Bipod Complete Lower Assembly