NBS 16″ Billet Slick Side 5.56 Parkerized Mid-Length 1:7 M-LOK Complete Upper
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
Black Nitride 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
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.
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Handguard | 12", 15" |
| Bolt Carrier Group | Black Nitride, Nickel Boron |
| UPC | 999991405, 999991737, 999991738, 999991739 |
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
- handle
- receiver
- accuracy
- red dot
- rounds
United States
First Time Build, First Time Success
I am pretty new to the AR platform, though I have been shooting pistols and bolt actions for a while. Well, the stars finally aligned and I was finally able to afford to get into it. I didn't just want something off the shelf, I wanted to learn as much as conceivably possible, and everyone else has PSA or something similar. So I started diving into research and comparing specs. It also helped that it was Labor Day so lots of sales going on. I stumbled across this NBS 16" Billet Slick Side 5.56 complete upper and after much wavering, comparing, and jumping from site to site, decided to pull the trigger. I ordered an Aero Precision stripped lower and a Black Rifle Depot upgraded lower parts kit. I really, really had a wonderful time building this rifle and I am absolutely THRILLED with the finished product. I decided to upgrade the grip, put in an improved Strike Industries charging handle, BCM Kag, and an inexpensive flashlight - the fit and finish are perfect. It looks like everything was made for each other, came together cohesively and beautifully. Next I slapped on a red dot and headed to the range. Barely took 5 mins to get sighted in. Before I knew it, I was popping off rounds and nailing bullseyes with consistent accuracy. I could have cried I was so happy. I literally had 3 other shooters looking in on my booth, asking about my rifle, and celebrating perfect shots - 2 of them were veterans. I had all of the fun that day. The nickel-boron BCG was just as shiny and crisp after shooting, barely had to clean a thing. Never jammed once. Never had a hiccup. Everything felt so smooth. I cannot find a SINGLE thing to complain or gripe about, but I'm also an enthusiastic newbie, so... If you're just getting into the AR platform, just starting builds, or just want to try something new at a fantastic price point, I couldn't recommend this upper receiver enough. It really, seriously is "No Bull$#!t"
AR-15 upper
It was easy checkout took a normal time to be delivered attached to my lower very easily.. cycled several rounds through it but still have not fired around through it. Hope everything works good when I do.
I searched high and low,
I searched high and low, researched, looked and and looked more. I had narrowed it down to two uppers from another manufacturer. Then I saw this one. I compared what I got for the price and there was no question. This was the clear winner. This upper is clean, smooth functioning, and fits my lower like a glove. I am very glad I didn't pull the trigger on a different one. The nicer BCG, charging handle, and Bear Creek barrel sold me on it. Having it here, and on a lower, I know I made the right choice. The customer service was great. (I had a warranty question that was answered in an email in minutes...not automated, there was a dude on the other end at midnight my time). The shipping was great too. Ordered on Wednesday morning, the mailman handed it to me Friday morning. Cant go wrong here. I recommend it 100%.
Fit and finish of this
Fit and finish of this upper is great, I ordered it on Friday 2/3/17 and it arrived on 2/6/17
