With the FM products .45 ACP AR upper receiver, you get the functionality of a non-reciprocating side charging handle instead of the traditional T-handle. Now you can charge your SBR or pistol without coming off of your target. The upper receiver and handguard are a monolithic design with a proprietary lock system that ensures the rail won’t loosen over time. The slim free float handguard features the popular M-LOK system, so you can attach lights, rail sections, or other accessories. Underneath the 8” M-LOK handguard is an 8.5” 4150 chromoly barrel that has a 1:16 twist rate for stabilizing the .45 ACP projectile. This barrel comes with a FM products blast diffuser that eliminates the concussion to the side of your rifle for use at indoor ranges. Why build a .45 ACP AR-15 from the ground up when you can get a head start with this complete upper from Fox Trot Mike Products.

Features:

  • Non-reciprocating fixed forward charging handle
  • Left or right side charging
  • 8.5” 4150 chrome moly barrel
  • 8” monolithic free float handguard
  • M-Lok attachment points
  • Continuous picatinny top rail
  • .45 ACP bolt carrier group included
  • FM products blast diffuser with 5/8×24” threads
  • Compatible with Glock magazines

The FM products 45 caliber upper receiver is designed to be used with the FM pistol caliber lower receivers as well as other .45 Glock lower receivers that use Glock magazines. Build the ultimate pistol caliber carbine for the range or home defense with the Foxtrot Mike complete upper receiver assembly.

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