NBS Premium Series 16" Upper Assembly w/ BA Barrel and Geissele MK8 Handguard - 8921
Only 3 left in stock
Built on a top tier 7075 forged upper receiver and fitted with the popular 16″ Modern Series Midlength Nitride Barrel from Ballistic Advantage, this premium barreled upper assembly is both durable and accurate. Over the years we’ve gotten thousands of 5 star reviews on the NBS line of complete uppers, we’re sure that this premium variant will go fast.
About the Handguard
The Super Modular Rail (SMR) MK8 M-LOK is Geissele’s ultra-modular model. These rails are designed to give the user full modularity while maintaining a strong and rigid platform. Maximum venting at the lower 45 quadrants create maximum heat dissipation and also dramatically reduces the rail’s overall weight. Utilizing Magpul’s M-LOK technology at the 3, 6, and 9 o’clock positions, as well as the upper 45 quadrants. The SMR MK8 is both versatile and modular, allowing the user to tailor their platform to his or her unique needs.
The SMR MK8 also features Geissele’s proprietary 2.25″ long barrel nut. This increases the surface contact where the rail interfaces with the receiver and creates a platform that can be trusted to be straight and true the entire length of the free float rail. This increases accuracy and zero repeatability during disassembly and reassembly when performing maintenance.
Barrel Information
Over the years Ballistic Advantage has earned a reputation for quality. We’ve sold thousands upon thousands of these barrels and get nearly universal praise from our customers. This Modern Series barrel is chambered in 5.56 NATO which will accept both .223 and 5.56 NATO rounds. It has a 1:7 twist rate and mid length gas system. These barrels also have a very clean QPQ Nitride finish which which can extend barrel life well past 20,000 rounds depending on ammo and usage.
Build QualityÂ
All NBS uppers are 100% made in the USA assembled by experienced, hard working armorers according to modern best practices. No shortcuts are taken and we guarantee a fit and finish that will satisfy even the most discerning builder.
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 | 64 oz |
|---|---|
| Dimensions | 28 × 5 × 5 in |
| Barrel Finish | Nitride / Melonite |
| Cartridge Compatibility | 5.56 NATO |
| Barrel Length | 16" |
| Gas System Length | Midlength |
| Twist Rate | 1-7 |
| BCG / Charging Handle | Not Included |
| MPN | 8921 |
| UPC | 999998921 |
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
- barrel nut
- thread lock
- washer
- Everything
US
Great build at a great price
Great build at a great price
USVery nice
haven't fired but love the gieselle rail
USExcellent
Put 200 rounds of steel case and brass through it today. Cycled everything, including the under powered steel!
USNice
Lovely upper but upon taking it apart both of the rail clamp bolts were missing thread lock, one was missing a washer and the barrel nut wasn’t coated with grease. I had a really good experience with AR15discounts they are now my favorite retailer
Nice
Lovely upper but upon taking it apart both of the bolts were missing thread lock, one was missing a washer and the barrel nut wasn’t coated with grease. I had a really good experience with AR15discounts they are now my favorite retailer
