Purchase the NBS 16″ 5.56 NATO Midlength Nitride M-LOK Rifle Kit w/ Holosun HS403C here!

NBS 16″ Gov Mid M-LOK Upper Assembly

A quality upper assembly without cutting corners. This means starting with a top tier mil-spec forged upper receiver, using a nitrided steel gas block as opposed to phosphate or aluminum, quality American Made M-LOK handguards and one of the nicest nitrided A2s you’ll find anywhere. This also means taking the time to ensure that the upper will function reliably. We use Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the properly torqued barrel nut and muzzle device.

Bottom line is this: you hear all the time about guys buying a budget upper and it not lasting or having to send it back because of some hardware defect or other issue caused by a careless assembly process. That is why we use top tier components and assemble each unit to the highest standard of quality. We want your upper to function flawlessly out of the box. In fact, we guarantee it will.

Buy with confidence, this upper is backed by our 30 day satisfaction guarantee. Buy it, run it, abuse it, and if you aren’t satisfied you can send it back for a full refund.

Lifetime Warranty

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

Made in the USA

Holosun HS403C Circle Dot

Features:

  • Designed for day and night use
  • 2 MOA on dot size
  • Parallax-free
  • Unaffected by extreme weather conditions
  • Durable construction

Specifications:

  • Model: 403C
  • Fit: 1913 Picatinny Rail
  • Type: Red Dot
  • Finish/Color: Black
  • Size: 2MOA Dot

BCA M16 Profile 5.56 NATO Complete Bolt Carrier Group – Black Nitride

  • Bolt Finish – Manganese Phosphate
    Bolt Material – 9310 Steel
    Caliber – 5.56 NATO (will also work with .223 and 300 BLK)
    Carrier Finish – Salt Bath Nitride
    Carrier Material – 9310 Steel Carrier
    Carrier Style – M16 Bolt Carrier
    Magnetic Particle Inspected
    Platform – AR-15

NBS Enhanced AR-15 Mil-Spec Charging Handle

Discount Mil-Spec Lower Build Kit

OEM 5.56/.223 Lower Parts Kit includes:

Bolt Catch, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch spring Buffer, Retainer, Buffer Retainer spring Disconnect, Disconnect spring Hammer (black or silver in color), Hammer Pin, Hammer spring Magazine Catch, Magazine Catch Button, Magazine Catch spring Pistol Grip (A2 style), Pistol Grip Lock Washer, Pistol Grip Screw, Pivot Pin, Pivot Pin Detent, Pivot Pin Detent spring Selector, Selector Detent, Selector Detent spring Takedown Pin, Takedown Pin Detent, Takedown Pin, Detent spring Trigger (black or silver in color), Trigger Guard, Trigger Guard Roll Pin, Trigger Pin, Trigger Spring

Omega Stock

Discount Mil-Spec Carbine Receiver Extension / Buffer Kit

Take a look at our other AR-15 Parts here!

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