Purchase the NBS 7.5″ 5.56 NATO Pistol Nitride M-LOK Pistol Kit w/ SIG Sauer ROMEO-MSR Green Dot here!

NBS 7.5″ Slick Side Billet 5.56 Nitride Pistol M-LOK Upper Assembly

An affordable pistol upper assembly without cutting corners. This means using a nitrided steel gas block from an American Manufacturer as opposed to aluminum and quality American Made handguards, paired with a 7.5″ Nitride treated barrel chambered in 5.56 NATO.

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 quality 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.

Lifetime Warranty

Upper Receiver NBS Slick Side Billet Upper
– 6061 Aluminum
– Pairs beautifully with any mil-spec lower
– M4 Feedramps
Barrel 7.5″ 5.56 NATO 1:7 Twist Pistol Length Nitride
Gas System Pistol Length
– APOC Armory Nitrided Steel Gas Block
– Stainless Steel Pistol Length Gas Tube
Handguard M-LOK Free Float Handguard (style may vary due to availability)
– American Made
– Extruded 6061 Aluminum
Muzzle Device Mil-Spec A2 Birdcage w/ Jet Black Nitride Finish

SIG Sauer ROMEO-MSR Green Dot Sight – 2 MOA

Features:

  • 2 MOA green dot sight
  • Aluminum housing
  • High performance coated lenses
  • Unlimited eye relief
  • Zero parallax
  • Top mounted rotary knob
  • 10 daylight brightness settings
  • 2 night vision brightness settings
  • Top mounted battery compartment – CR1632
  • 20,000 hours of runtime
  • IPX-7 waterproof and fog proof
  • Includes lightweight absolute co-witness mount
  • Includes see through lens covers

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

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

SB Tactical SBA3 Pistol Stabilizing Brace

Features:

  • Minimalist design
  • 5-position adjustable
  • Integral, ambidextrous QD sling socket
  • ATF compliant, US veteran designed and proudly made in the USA
  • Product includes:  brace, adjustable nylon strap

Discount Mil-Spec Carbine Receiver Extension / Buffer Kit

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