NBS 16″ 5.56 Phosphate Midlength M-LOK Lightweight Complete Upper

We wanted to build an affordable upper assembly without cutting corners. This means using a steel gas block from an American Manufacturer as opposed to aluminum, quality American Made handguards and using a proven M16 profile nitride BCG paired with a NBS 16″ Mid-Length Barrel.

This also means taking the time to ensure that the upper will function reliably. We 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 Forged Upper Receiver
– M4 Feedramps
– .250 takedown pin holes

Barrel
NBS 16″ 5.56 1:9 Twist Phosphate Lightweight Mid-Length Barrel
– Guaranteed to hold a 1.000″ MOA at 100 yards with appropriate ammo and shooting techniques.

.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
•    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

Charging Handle
NBS Enhanced Charging Handle

Gas System
Mid-Length
– Steel Gas Block
– Stainless Steel Mid-Length Gas Tube

Handguard
Handguard style may vary from batch to batch
– American Made

Muzzle Device
Mil-Spec A2 Birdcage – Nitride