Foxtrot Mike Products 7" Glock Style Ultra Light 9mm Tri-Lug Complete Upper - 5" M-LOK Rail - Primary Arms Exclusive

Manufactured by Foxtrot Mike Products
1 Reviews



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Foxtrot Mike Products is at it again with another 9mm AR upper exclusively built for Primary Arms. For those wanting an even smaller and lighter pistol, this build features a short 7” barrel with a 1:10 twist rate.  The upper receiver is machined from billet aluminum allowing for a greater degree of customizability for look and function. Foxtrot Mike is building some of the most popular AR-9s on the market and Primary Arms is proud to offer them directly to you.

  • Ambidextrous charging handle
  • 7” barrel chambered in 9mm
  • Billet upper receiver
  • Blow back recoil mechanism
  • Tri-Lug Adapter
  • 1.3" internal diameter handguard
  • 5.5" M-LOK handguard

Manufacturers Note: For optimal reliability, FM Products does not recommend using aluminum case ammo in their uppers or complete firearms.


Barrel Length7
BrandFoxtrot Mike Products
Caliber Gauge9mm Luger
Gas System LengthBlowback
Gas System TypeBlowback

Ratings & Reviews

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If you haven’t tried your silencer on a Tri-Lug you’re missing out

by -

If you have a silencer the Tri-Lug is the way to go. I have silencers for threaded barrel pistols in 9 and .45 then ratchet type connections for .308 and 5.56 and thought that was the best because they don’t loosen like the threaded pistols do. Then I bought the Tri-Lug which puts everything else to shame. It simply slides on passed the lugs then you’ll feel tension and turn it a 1/3 twist and it locks in place. The tension is from the internal spring in the silencer which acts like a lock washer keeping the silencer from loosening. It’s the easiest to put on and come off with a positive lock that does not fail. If you’ve read this far you’re like I was and want it. Just buy it and post here next week.