NBS AR-15 Left Handed Slick Side Billet Upper Receiver - 5162
In stock
The NBS Left-Handed Slick Side Billet Upper Receiver is a quality, American made billet upper featuring a unique design that sets it apart from traditional forged upper receivers. Manufactured to exacting standards on five axis CNC machines from a solid block of aircraft grade aluminum, this stripped upper not only looks good… it is built to last.
- Compatible with mil-spec forged lower receivers and most billet lower receivers
- .250 takedown / pivot pin holes
- No forward assist
- Weight: 7.1oz
*Does not come with anti-rotation pin for use with NBS Free Float M-LOK Handguard and Dirty Bird Gen 2 Handguards. Anti-rotation pin can be found below:
98381A470 – NBS/Dirty Bird Gen 2 Handguard Anti-Rotation Pin – AR15Discounts
Made in the USA
Backed by the NBS Limited Lifetime Warranty
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 | 7.1 oz |
|---|---|
| Dimensions | 7.67 × 1.76 × 2.31 in |
| Finish | Anodized, Black |
| Forward Assist | Not Compatible |
| Port Door / Dust Cover | Not Compatible |
| Receiver Material | 6061 Aluminum |
| T-Marks | Unmarked |
| Feed Ramps | M4 |
| MPN | 5162 |
| UPC | 999995162 |
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
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US
Great!
Great quality upper! No burrs or damage and it arrived well packaged. Installed a BA barrel and left hand SA bolt and NBD bolt assembly. Installed it on a previous lower I built and shot 20 rounds thru it to test for any issues and had none. Shot smooth with no initial issues. Very pleased!
USProduct looks great. Cant wait to finish the build
Very good . Associate was very heful in helping me get the part cerakoted and it looks great
USPreparing for “Lefty”
Great ! Functioned perfectly. No issue. Both bolt and upper were perfect match.
USNice fit and finish
Left handed parts are hard to find. This upper is a great value on a hard to find part. Bought it to build a left handed upper to use instructing left handed students and am quite happy with it.
USHad to do a little work to make it fit...
So being demon handed, I have been hunting for a left handed receiver for a hot second. Was glad this came up, and overall it is a solid piece, albeit different than a normal upper receiver. It did not quite want to fit my handguard from Odin Works. All good, I was gonna paint the receiver FDE anyways, and so i grinded and polished the receiver (as it was cheaper than the handguard lol) to make it fit accordingly. For the price for a Lefty, i cant complain at all, but gave it a 4 star due to fitting issues.
