The Foxtrot Mike Products FM-9 Complete 9x19mm Upper Receiver is feature rich and cutting edge. Built from the ground up to provide outstanding reliability and accuracy with a host of top tier features. The traditional M4 charging handle has been replaced with an ambidextrous, non reciprocating forward charging handle. The monolithic style has been achieved with a proprietary interlock between the upper and handguard. Lastly, the slim-line handguard is M-LOK compatible for your favorite accessories.

The FM-9 Monolithic 9mm Upper Receiver can be had in three different barrel lengths, so whether you’re building a pistol or a carbine, there’s a setup that’s perfect for your build.

  • Includes M-LOK compatible Handguard
  • All three uppers feature an Ultra Light PCC barrel
  • Barrel lengths: 16, 10.5 or 8.5 inches
  • 16″ barrel comes with FM Products Muzzle Brake
  • 8.5″ and10.5″ barrels come standard with the FM Products Forward Blast Diffuser
  • 10.5″ Upper Receiver features 8.5″ Ultra Light Barrel with a 10.5″ Handguard for an ultra compact upper
  • Made in the USA
  •  Type 3 Hard Anodize finish
  •  Manufactured with ISO:9001 and AS:9100 quality certifications
  • Ultra Premium, Match Grade, Lightweight 41V50 Barrel 1/2-36″ threads
  • Ambidextrous forward charging handle
  • Limited lifetime warranty through Foxtrot Mike Products
  • Complete upper includes Ultra Premium Bolt Carrier Group
  • Available in either Glock or Colt Style
  • Inner diameter of a handguard is 1.3″
  • Available in 16″, 10.5″ and 8.5” Uppers

8.5″ Complete upper

10.5″ Complete upper

16″ Complete upper