Radical Firearms 5.56 SOCOM AR-15 Barreled Upper with BMD - Primary Arms Exclusive - 16"

Manufactured by Radical Firearms
2 Reviews


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NOTE: Limit 2 per household. Quantities exceeding 2 will not allow checkout.


Out of Stock


This AR-15 upper assembly features the Radical Firearms generation 3 handguard is a Primary Arms exclusive that has a new mounting system that ensures the handguard stays tight against the barrel nut and receiver. It is a free-float design, meaning it does not contact the barrel which could result in inconsistent accuracy like standard M4 delta ring handguards. It has M-LOK slots along the sides and bottom for mounting any tactical accessories that you want. The full length picatinny top rail offers a solid mounting point for scopes, red dots, or iron sights to increase the effectiveness of your rifle.

  • 16” 4140 Chromoly barrel with melonite coating
  • 5.56 SOCOM profile
  • M4 feed ramps
  • 1:7 twist rate
  • BMD muzzle brake that reduces felt recoil and muzzle rise
  • 1/2x28 thread pitch
  • Low profile gas block
  • Mid-length gas system
  • Radical Firearms forged MIL-STD upper receiver
  • MIL-STD upper parts kit
  • Radical Firearms forward assist
  • Radical Firearms 15" Primary Arms exclusive M-LOK rail with Gen 3 mounting system
  • Integrated M-LOK attachment points on the sides and bottom

With a huge selection of AR-15 parts and accessories to choose from, it can be difficult to decide which parts to purchase for your next build. Radical Firearms has you covered with this barreled upper receiver that contains all the upgrades you could want in a semi-automatic 5.56mm rifle. This assembly features a 16” 4140 chromoly barrel with a melonite coating for long-lasting durability and exceptional corrosion resistance. The SOCOM barrel profile is designed to increase accuracy potential by providing a thicker, more rigid barrel that is less likely to move during prolonged firing. It has a 1:7 rifling twist rate that can stabilize a wide range of bullet weights and M4 feed ramps in the barrel extension to ensure reliable feeding with all types of ammo. Attached to the 1/2x28 muzzle threads is the Radical Firearms BMD muzzle brake that vents excess gas pressure upward to reduce muzzle climb and felt recoil so you can get back on target faster. This affordable upper receiver comes completely assembled, all you need is a bolt carrier group and charging handle and attach it to a complete lower to have a functioning rifle for a fun day at the range.

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.


AssemblyBarreled Assemblies
Barrel CoatingSalt Bath Nitride
Barrel ContourSOCOM
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel Material4140 Chrome Moly Steel
BrandRadical Firearms
Caliber Gauge5.56 NATO
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in Primary Arms Exclusive M-LOK Rail
Muzzle DeviceRadical Firearms BMD Muzzle Brake
Thread Pattern1/2 X 28
Twist Rate1:7

Ratings & Reviews

2 reviews

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great inexpensive upper

by -

This is a great quality upper that is not terribly expensive. The entire thing is well made and it fit with my lower and bcg no problem. Only thing that bothers me is the brake is not straight, but it doesnt have to be I guess, I might time it in the future but as it is it works perfectly fine.

Best economy upper!!!


Purchased the Radical Firearms upper to pair up with my Smith & Wesson M&P lower, worked flawlessly with no failures. Will definitely purchase another from Primary Arms, quick delivery and well packaged.