Foxtrot Mike Products Complete FM-15 GEN 2 .223 Wylde AR-15 Upper Receiver - 9" Barrel - Fixed Gas Block

Manufactured by Foxtrot Mike Products
Manufactured by Foxtrot Mike Products
1 Review

In Stock

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The Foxtrot Mike Products FM-15 Gen 2 Side Charging AR-15 Upper Receiver features a unique dual spring recoil system nested in the top of the upper receiver allowing the use of a folding stock. This recoil system is paired with a carbine length direct impingement gas system and a proprietary lightweight bolt carrier group for a smooth and reliably functioning rifle. The fixed gas block features an indexing pin and a coil pin to keep it locked in place against the lightweight contoured barrel for an extremely robust system.


  • Machined from a billet of aluminum
  • 4 Position side charging handle
  • Slim M-LOK handguard
  • .223 Wylde chambering
  • Proprietary lightweight BCG
  • Picatinny rail adapter with QD sling mount
  • 9"  barrel
  • Fixed gas block 
  • Carbine gas system
  • Compatible with Mil-Spec lowers (buffer and buffer spring will not be used)

The barrel features a .223 Wylde chamber and a 1:8 twist rate for compatibility with a wide range of ammunition. Additionally, it features a lightweight contour and at 9 inches in length.

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Barrel Length9
BrandFoxtrot Mike Products
Caliber Gauge.223 Wylde
FinishHardcoat Anodized
Gas System LengthCarbine
Muzzle DeviceFM Blast Diffuser
Twist Rate1:8
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

1 review

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Great Upper

by -

The engineering on this upper is quite good. Not cheap and makes a great backpack/truck gun. Being able to have as a pistol without a buffer tube is nice. I like mine very much.