Description
NBS 20 5.56 Phosphate Rifle M-LOK Government Upper Assembly
A quality upper assembly without cutting corners. This means starting with a top tier mil-spec forged upper receiver, using a low-pro steel gas block, quality American Made M-LOK handguards and one of the nicest nitrided A2s youll 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 arent satisfied you can send it back for a full refund.
Handguard style may vary from batch to batch
Lifetime Warranty
Guaranteed Sub-MOA performance with match grade ammo and proper shooting technique
Made in the USA
.223/5.56 Bolt Carrier Group Black Nitride
Caliber: 5.56x45mm NATO/.223 Rem, .300 Blackout
Finish: Salt Black Nitride
Bolt: 9310 Alloy Steel (High Hardness)
Carrier: 8620 Aircraft Grade Steel
Extractor: Shot Peened and Case Hardened D2 Tool Steel
Firing Pin: Mil-spec 8740 steel with hard chrome finish
Gas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealed
Cam Pin: 8620 Steel w/ Black Nitride Finish
Quality Control: MPI Inspected for QC
NBS Enhanced AR-15 Mil-Spec Charging Handle
Discount Mil-Spec Lower Build Kit
Surplus 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
Carbine Stock Style May Vary Depending on Availability
Discount Mil-Spec Carbine Receiver Extension / Buffer Kit
About the Brand
NBS by AR15Discounts
NBS Our In-House Brand for Builders Who Demand Reliable Performance and Real Value.
Designed for builders who demand reliable performance and real value without unnecessary hype or inflated pricing. NBS stands for “No Bullshit.”
Built on Strong Industry Partnerships
Through the strong partnerships AR15Discounts has built with trusted suppliers and vendors, we regularly gain access to premium components often manufactured by or for leading industry names. By purchasing these in volume, we bring them to you under the NBS label, ensuring proven quality reaches your build at a fair price, without the added cost of extensive marketing.
Quality You Can Trust
Every NBS product is specified to the exacting standards we apply to our own rifles. Each component features precision CNC machining, American-made key components where it counts, robust materials, dependable steels, and durable finishes engineered for long-term reliability. These items are either sourced from reputable OEMs or carefully assembled in-house using established name-brand elements, maintaining consistent excellence throughout the lineup.
Complete Solutions for Serious Builders
From stripped and complete uppers to bolt carrier groups, handguards, lower parts kits, and beyond, NBS provides a unified, affordable selection that allows you to complete confident, high-performing builds.
Backed by a Limited Lifetime Warranty
All NBS products come with our Limited Lifetime Warranty for the original owner, covering defects in materials and workmanship. AR15Discounts stands firmly behind these parts because, as shooters ourselves, we use and trust them, delivering honest value and gear you can rely on.
NBS Limited Lifetime Warranty For the Original Owner
Covering defects in materials and workmanship AR15Discounts stands firmly behind these parts As shooters ourselves, we use and trust them Delivering honest value and gear you can rely on
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