Black Rifle Depot

20" 5.56 Gov / SOCOM M-LOK Upper Assembly

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  • Black Rifle Depot 20" 5.56 Gov / SOCOM M-LOK Upper Assembly
  • Black Rifle Depot 20" 5.56 Gov / SOCOM M-LOK Upper Assembly
Now: $429.95
Was: $449.95


20" 5.56 Gov / SOCOM M-LOK Upper Assembly

This is a high quality 20 inch upper assembly that works as good as it looks. it is built using a top tier mil-spec forged upper receiver, a 5.56 Mil-Spec Steel Black Nitrided Barrel, an APOC Armory black Nitride steel gas block, a quality American Made M-LOK handguard (handguard style may vary) and a top of the line Black Nitride A2. It boasts a higher velocity and a longer sight radius with this Government Contour barrel chambered in 5.56 with a 1:7 twist and a rifle gas system. We always take the extra time to ensure that the upper will function properly and reliably. It is built with Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the properly torqued barrel nut and muzzle device.

This is a great product at a great price from an industry leader. Buy with confidence.


Upper Receiver

  • 7075 Aluminum
  • Pairs beautifully with any mil-spec lower
  • M4 Feed Ramps


  • 20″ Black Nitride 4150 Steel Government Barrel
  • 5.56 NATO
  • Rifle Length Gas System
  • 1:7 Twist

Gas System Rifle Length

  • APOC Armory Nitrided Steel Gas Block
  • Stainless Steel Rifle Length Gas Tube


  • 15″ NBS M-LOK Free Float Handguard
  • American Made
  • 6061 Aluminum*Handguard style may vary

Muzzle Device

  • Mil-Spec A2 Birdcage
  • Jet Black Nitride Finish


*Does not include bolt carrier group or charging handle 


Lifetime Warranty

Made in the USA

NOTE: Guaranteed Sub-MOA performance with match grade ammo and proper shooting technique

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