NBS Slick Side Billet Upper Receiver
The NBS 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.
- M4 Feedramps
- Compatible with mil-spec forged lower receivers and most billet lower receivers
- .250 takedown / pivot pin holes
- No forward assist
- Designed to be used with or without a port door / dust cover (will need to remove c-clip from dust cover pin before assembly)
- 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
***UPPER MAY NOT BE COMPATIBLE WITH HANDGUARDS THAT FEATURE ANTI-ROTATION TABS.
Made in the USA
Backed by the NBS Limited Lifetime Warranty
| Weight | 0.0000 oz |
|---|---|
| Color | Black, Burnt Bronze, FDE, Grey, Midnight Bronze, OD Green, Zombie Green |
| MPN | AR-15EBU, REV F |
| UPC | 3005-004, 3005-001, 3005-005, 3005-006, 3005-003, 3005-001, 3005-002 |
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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- Looks
US
Billet Receiver
Honestly best bang for your buck. I just received it in the mail and I’m actually impressed, I wasn’t sure what to except but 5/5 on the rating.
USAr15 build
Good receiver and fit and finish is very good .
United StatesGreat quality
Great upper. No brass deflector warning. If your rifle is perfectly gassed, the brass will eject in the face of left handed shooters.
USSlick side billet upper
I got it on 1-5-2026 but it was missing some machining steps, Customer support email me a shipping label, Great service!!
USBest upper I’ve used in awhile
This slick side upper is really made well! Handguard mates up with no gaps. I lapped the receiver face like I always do and it was flat and perpendicular already. Price is good too. I’m very happy.
