NBS 16″ 5.56 Phosphate Midlength M-LOK Lightweight Complete Upper - 26949
In stock
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
| Weight | 64 oz |
|---|---|
| Dimensions | 28 × 5 × 5 in |
| Barrel Finish | Mag Phosphate |
| Barrel Profile | Lightweight |
| Cartridge Compatibility | 5.56 NATO |
| Barrel Length | 16" |
| Gas System Length | Midlength |
| Twist Rate | 1-9 |
| BCG / Charging Handle | Included |
| MPN | 26949 |
| UPC | 26949 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Customer Reviews
- Reviews
- Questions
US
Surprising accuracy. 556 upper that punches above its price
I put this 556 complete upper on my rifle roughly five months ago and have used it extensively on the range since. My main takeaway: the accuracy is phenomenal. I’m getting essentially the same results ( 1 moa, sometime sub ) as my dedicated ADM4 Mod2 $2,400 complete rifle, same point of impact, comparable group sizes, and consistent shot to shot performance. That’s not an exaggeration; it’s the level of performance I’d expect from an upper built with careful attention to barrel quality, chamber, and harmonics. What I changed: I swapped the charging handle right away and later replaced the bolt carrier group ( after 1000 rounds ) only because I upgraded to Unrivaled Technologies, so new muzzle break, ultralight bcg, and competition buffer system. They refined the setup, but the baseline accuracy came from the upper itself. Reliability hasn’t been an issue, multiple ammo types, tried most match ammo and gr from 55 to 77. The upper has fed, fired, and ejected cleanly. Fit and finish are clean, the barrel harmonics feel stable, and the upper mated to my lower without torque drama. If you’re hunting for accuracy close to high dollar complete rifles but want to save money (or build modularly), this upper is a standout. Highly recommended. I plan on buying 2 more.
USNot received
Have not received them yet. Where are they? I paid an extra $10 for expedited shipping??
