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, OD Green, Zombie Green |
| Feed Ramps | M4 |
| MPN | AR-15EBU, REV E |
| UPC | 3005-005, 3005-006, 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
- Reviews
- Questions
US
Great upper
Very good quality and price will definitely buy from again
USBuild
Nice upper reciever. Matches with my hand guard and lower. Light weight also.
United States
NBS SLICK SIDE UPPER
Fast shipping 👍 Checked the fit against 2 other 80% lowers builds awesome fit, so tight I don’t need the accu-wedge’s that I have in other 2 builds. Bcg fits perfectly, buffer tube assembly is all good. This is an AR 9 build , still waiting on other parts to complete. So far so good. Awesome prices.
United StatesMake Eugene Stoner proud
This upper receiver looks really cool, especially in conjunction with a lower with a less rounded, more angular appearance. It also lacks a forward assist, which Eugene Stoner himself thought was unnecessary, so you can feel vindicated in being a hipster. The lack of a brass deflector makes this a poor choice for a left-handed shooter. The finish will likely scratch off of the top point at the rear of the ejection port immediately when you start shooting with it, but you should consider a different hobby if you're afraid of a scratch or two acquired from actually shooting your rifle.
USPrecision upper.
Bought this as an alternative to the run of the mill forged uppers and haven't been disappointed. Not quite done with the build yet but when you go to lap an upper receiver and you're done in minutes doing it by hand and it's perfect, that speaks well of the precision built in to it. This will be used for either a 6.5 Grendel or 6mm ARC build, and hopefully it'll be a tack driver. In the meantime, I'm gonna keep buying from AR15Discounts! Thanks folks!
