Description
Foxtrot Mike Products is at it again with another 9mm AR-15 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.
Features:
- Non-threaded barrel
- Standard charging handle
- 7” barrel chambered in 9mm
- Billet upper receiver
- Blow back recoil mechanism
- Integrated Tri-Lug mount machined directly into barrel
- 1.3" internal diameter handguard
- 5.5" M-LOK handguard
Manufacturers Note: FM Products does not support the following items, using these may void the lifetime warranty associated with our uppers;
1) FM Products does not support Aluminum Cased ammo. Blow backs have a much higher pressure spike in the chamber than a handgun. Using Aluminum cased ammo in a blow back PCC is dangerous and will void the lifetime warranty of an FM Products Upper Receiver.
2) FM Products does not support import magazines besides OEM Glock magazines. We recommend Magpul, OEM Glock and ETS magazines only.
3) FM Products does not support Spikes Glock style lower receivers. The LRBHO requires consumers to modify the FM Products upper, to make egress for the Spikes LRBHO. The FM Products upper is cut to the Colt spec, therefore we have no plans to deviate from that. Modifying your FM Products Upper to accommodate a Spikes Tactical Glock style lower will void the lifetime warranty on our PCC Uppers.
4) We only recommend Sylvan magwell adapters, as they require no modifications or adjustments to work properly. FM Products does not support Stern Magwell Adapters as they require regular adjustments to work properly.
5) Some aftermarket Tri-Lug muzzle devices may not be compatible with this product. For any questions regarding parts and compatibility, please contact us at info@primaryarms.com and we will get back to you as soon as possible.