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.

  • Ambidextrous Proprietary Non Reciprocating Forward Charging Handle
  • Manufactured with ISO:9001 & AS:9100 quality certifications
  • Type 3 Hard Anodize finish
  • 100% Made in America
  • Made From Premium American made Aircraft Grade 6061-T6 Aluminum
  • 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
  • Proprietary Interlocking feature between Handguard and Upper Receiver
  • Charging Handle: Ambidextrous Paratrooper folding style
  • Warranty: Transferable, Limited Lifetime Warranty
  • Barrel lengths: 16, 10.5 or 8.5 inches
  • Black finish