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Questions & Answers
is this a complete upper? Expert Answer

Yes, this is a complete upper receiver with the bolt carrier group.

by Ethan C., Gear Expert, July 12, 2019
1/2x36 is odd. Other sights say the same barrel comes 5/8x24. Is the thread pitch correct here ? Expert Answer

FM Products lists the 8.5" barrel upper as having a 5/8x24 threaded blast diffuser and the 16" barrel upper as having a 1/2x36 threaded blast diffuser.

by Jonathan D., Gear Expert, October 26, 2019
Customer Reviews
Helpful Negative Review
.45 is a tough caliber in this format and this upper has consistently had multiple failures to feed and failure to stop open. Side charging is cool for running suppressed but this system is unreliable and even after sending back to FM it is still exh...
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Product No Longer Available

Unfortunately FM Products Foxtrot Mike FM-45 Upper Receiver is not listed by OpticsPlanet.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for FM Products Foxtrot Mike FM-45 Upper Receiver

This FM Products FM-45 Upper Receiver is specifically designed for use with FM pistol caliber lower receivers or other .45 Glock lowers that accept Glock magazines. The barrels of these AR15 Upper Receivers from the experts at FM Products are constructed with 4150 chrome moly steel for reliable durability that can handle high heat. Throughout the FM Products 45 Caliber Upper Receiver, you'll find M-LOK attachment points for enhanced customization opportunities for your weapon. Also, there's a continuous top Picatinny rail to attach optics and other accessories. These uppers are compatible with Glock magazines and are the perfect part to complete your pistol caliber carbine build. Evolve your pistol by using the FM Products Complete Upper Receiver .45ACP Glock Style.image

Features of FM Products Foxtrot Mike 45 Caliber Upper Receiver

  • Forward mounted charging handle (charging handle does not fold)
  • 8.5in 4150 chrome moly barrel or 16in 4150 chrome moly barrel
  • 8in monolithic free float handguard or 15in monolithic free float handguard
  • M-Lok attachment points
  • Continuous Picatinny top rail
  • .45 ACP bolt carrier group included
  • FM Products Foxtrot Mike blast diffuser with 1/2x36in threads or FM Products Foxtrot Mike muzzle brake with 1/2x36in threads
  • Compatible with Glock magazines

Package Contents:

  • FM Products Foxtrot Mike FM-45 Upper Receiver

Ammunition

1–40 / 40
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Ammo Boxes

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Related Products to FM Products Foxtrot Mike FM-45 Upper Receiver

FM Products Foxtrot Mike FM-45 Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • FM Products Upper Receiver, FM-45, 8.5in, w/Flash Supressor, Black, FM45-8.5UR , MPN: FM45-8.5UR , Code: 3JR-UFH-FM45UR-FM45-8-5UR
  • FM Products Upper Receiver, FM-45, 16in, w/Flash Supressor, Black, FM45-16UR , MPN: FM45-16UR , Code: 3JR-UFH-FM45UR-FM45-16UR
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