Radical Firearms 5.56 SOCOM Barreled AR-15 Upper - Zero Impulse Muzzle Brake - RPR Handguard - 16"

Manufactured by Radical Firearms
SKU: FU16-5.56SOC-15RPR-ZS
MPN: FU16-5.56SOC-15RPR-ZS
Manufactured by Radical Firearms
2 Reviews

In Stock

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The Radical Firearms AR-15 upper receiver assembly comes ready out of the box to attach to any Mil-Spec lower receiver. It has a forged M4 railed upper so you can easily attach scopes and red dot sights to the MIL-STD rail. The upper receiver is does not include bolt carrier group or charging handle but comes complete with a Mil-Spec upper parts kit that includes an ejection port cover and forward assist. The barrel is 16” of 4140 chromoly steel with a Melonite coating and is attached via a steel barrel nut. The barrel has a 1:7 twist, designed to stabilize heavier 556 NATO and 223 Remington ammo at intermediate ranges. Don't worry, this twist rate will still stabilize common 55 grain FMJ ammo as well, so your range time won't be affected by not being able to find 62 grain Gold Dots. Attached to the heavy SOCOM profile barrel is a Zero Impulse muzzle brake for enhanced recoil control. The brake is threaded 1/2x28 threads. This barreled upper receiver is an awesome way to finish your AR-15 build with money left over.

  • 16” 4140 Chromoly barrel with Melonite coating
  • 5.56 SOCOM profile
  • M4 feed ramps
  • 1:7 twist rate
  • Zero Impulse muzzle brake
  • 1/2x28 TPI
  • Low profile gas block
  • Mid-length gas system
  • Radical Firearms forged Mil-Spec upper receiver
  • Mil-Spec Upper parts kit
  • RF Dimpled forward assist
  • Radical Firearms 15" RPR handguard
  • Integrated M-LOK slots
  • Made in Houston, Texas U.S.A.
  • Does not include BCG or charging handle

Radical Firearms offers law enforcement grade hardware. Crafted with quality materials and covered by their lifetime warranty, Radical Firearms is an outstanding choice for any budget.
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Barrel CoatingMelonite
Barrel ContourSOCOM
Barrel Length16
Barrel LiningMelonite
Barrel Material4140 Chrome Moly Steel
BrandRadical Firearms
Caliber Gauge5.56 NATO
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in Radical M-LOK RPR Rail
Muzzle DeviceRadical Firearms Zero Impulse Muzzle Brake
Thread Pattern1/2 X 28
Twist Rate1:7
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 www.P65Warnings.ca.gov.

Ratings & Reviews

2 reviews

  • 4 stars
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  • 1 star
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No problems

by -

I used this upper assembly for my first build and it shot great.

handguard came loose, gas leaks from block


The headline says it all, really. The handguard came loose after around 500 rounds. It came with no teardown manual so i guessed how tight to tighten the screws and ended up stripping the allen head. After finally getting the screws off i discovered tons of residue from gas escaping between the gas block and gas tube. Not great for keeping carcinogens and lead residue off your hands. I'm waiting to hear from Radical Firearms to get replacement screws.