NBS 16" Mid-Length 5.56 NATO 1:7 M-LOK Complete Upper

SKU# 1405 | by NBS
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Bolt Carrier Group

This is the first upper in our line of NBS (No Bullshit) Upper Assemblies. We wanted to build an affordable upper assembly without cutting corners. This means using a nitrided steel gas block from an American Manufacturer as opposed to aluminum, quality American Made handguards, providing an upgraded extended latch charging handle and using reputable internals like the proven APOC Armory Black Nitride BCG paired with a Bear Creek 16" Mid-Length Barrel. 

This also means taking the time to ensure that the upper will function reliably even when used in adverse conditions. We dimple each and every barrel and check for excessive leaks in the gas system using compressed air. We use Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the 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 brand name components,  assemble each unit to the highest standard of quality, and why we don't sell our uppers without pairing it with a BCG. We want your upper to function flawlessly out of the box. In fact, we guarantee it will. 

Lifetime Warranty 

Upper Receiver

Aero Precision 
- T-Marked
- 7075-T6 aluminum 
- M4 Feedramps 
- .250 takedown pin holes


Bear Creek 16" 5.56 NATO 1:7 Twist Mid-Length Parkerized
- Guaranteed to hold a 1.000" MOA at 100 yards with appropriate ammo and shooting techniques.

Bolt & Carrier Group

APOC Armory Black Nitride M16 Bolt Carrier Group .223/5.56
(Optional Upgrade to APOC Armory Premium High Polish Nickel Boron BCG)
- Full Auto Capable
- 9310 MPI and HPT Tested Bolt
- Case Hardened 8620 Carrier
- 4130 Gas Key
- Grade 8 Hardware With Proper Staking
- Gas Key Sealed With Permatex No.3
- 8740 Hard Chrome Firing Pin

Charging Handle

APOC Armory Extended Latch

Gas System

- APOC Armory Nitrided Steel Gas Block
- Stainless Steel Mid-Length Gas Tube


Matrix Arms M-LOK Free Float Handguard - Black
- American Made

 Muzzle Device Mil-Spec A2 Birdcage


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