Foxtrot Mike Products 16" Barreled Upper Receiver - 15" M-LOK Rail with Muzzle Break

Manufactured by Foxtrot Mike Products
SKU: PA-FM556-16
MPN: PA-FM556-16
Manufactured by Foxtrot Mike Products
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Standard orders will ship out 1 business day if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

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Why build an AR-15 from the ground up when you can get a head start with this upper from Fox Trot Mike Products? The FM AR-15 upper receiver assembly comes with a large assortment of features and improvements over standard AR platform uppers. The monolithic upper and handguard are attached via a proprietary locking system to ensure that it doesn’t loosen over time. This free float rail also uses the M-LOK system, so you can attach your favorite lights, grips, or other accessories. Underneath the M-LOK handguard is a 16” 4150 chrome moly barrel. This complete AR-15 upper receiver group is a great option if you want to quickly assemble an AR-15 for home defense or the range.

  • 16” 5.56 NATO barrel with FM products 4-port Micro muzzle brake
  • .223 Wylde chambering
  • 1:8 Twist rate
  • Lightweight barrel profile
  • 41v50 Barrel steel
  • 15” M-LOK free float handguard
  • Mid-length gas system
  • .625" Patent pending fail-proof gas block
  • Proprietary handguard / upper interlock keeps handguard true to the upper
  • Handguard and upper made from a billet of 6061-T6 aluminum
  • Type 3 hardcoat anodized finish
  • Weight: 3.2 lbs.
  • Total Length: 24.125"
  • Limited lifetime warranty through Foxtrot Mike Products

This AR-15 complete upper receiver group is designed to be compatible with most AR-15 style lower receivers. The receiver and handguard are machined from 6061-T6 aluminum and have a Mil-Spec Type 3 hardcoat anodized finish.

Feature rich, high-quality, and affordable, Foxtrot Mike Products offer cutting edge solutions utilizing the highest quality materials and manufacturing processes available.
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AssemblyBarreled Assemblies
Barrel CoatingSalt Bath Nitride
Barrel ContourLightweight
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandFoxtrot Mike Products
Caliber Gauge.223 Wylde
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in M-LOK Rail
Muzzle DeviceMuzzle Brake
Thread Pattern1/2 X 28
Twist Rate1:8

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