Description
Description
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 and using a proven M16 profile Black Nitride BCG paired with an NBS 16″ Mid-Length Parkerized Barrel.
This also means taking the time to ensure that the upper will function reliably. We dimple 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.
Lifetime Warranty
Upper Receiver
NBS Slick Side Billet Upper Receiver
– M4 Feedramps
– .250 takedown pin holes
Barrel
NBS 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
Phosphate or Nickel Boron M16 Bolt Carrier Group .223/5.56
– Full Auto Capable
– 9310 Alloy Steel 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
NBS Enhanced AR-15 Mil-Spec Charging Handle
Gas System
Mid-Length
– APOC Armory Nitrided Steel Gas Block
– Stainless Steel Mid-Length Gas Tube
Handguard
NBS 12″ or 15″ M-LOK Handguard
– American Made
Muzzle Device
Mil-Spec A2 Birdcage – Nitride
Handguard
12", 15"
Bolt Carrier Group
Nickel Boron, Phosphate
Barrel Profile
Government / SOCOM
Gas System Length
Midlength
Barrel Length (inches)
16
Barrel Chamber
5.56 NATO
BCG / Charging Handle Included
Included
SKU: nbs-16-midlength-556-m-lok-complete-upper
