The Foxtrot Mike Products 9mm Upper Receiver comes fully assembled and ready to drop on any pistol caliber lower receiver that uses Glock magazines. With its full-length Picatinny top rail and M-LOK compatible handguard, the Foxtrot Mike 9mm Upper offers plenty of mounting space for optics and other accessories.

A unique interlocking connector between the upper receiver and handguard ensures the barrel nut will not work loose over time.

  • Premium Melonite-finished 4150 carbone steel
  • Button-rifled bore, 1-10″ twist
  • ½”-36 threaded muzzle
  • Ambidextrous, non-reciprocating forward charging handle
  • Bolt/carrier unit with hard Melonite finish, too

Engineered to function reliably, no matter which manufacturers’ lower it’s mated with, the Foxtrot Mike 9mm Upper Receiver is forgiving enough to cycle even the most economical (we’re not saying “cheap”!) steel, brass, or aluminum cased ammo.

Foxtrot Mike Products FM-9 Upper Receivers are not compatible with Korean magazines.