Upgrade your AR-15 build with the NBS Premium Series 14.5″ 5.56 NATO Upper Assembly featuring the CMT UHPR Mod 2 HDX handguard. Engineered for precision shooting and tactical reliability, this complete upper delivers exceptional performance in a compact package, ideal for home defense, range sessions, or competitive builds. With its mid-length gas system and high-quality components, experience smoother operation and reduced recoil for faster follow-up shots.
Key Features
- CMT UHPR Mod 2 HDX Handguard: A 15-inch free-float M-LOK rail made from 6000-series extruded aluminum with Mil-Spec Type 3 hard black anodizing for superior durability and heat dissipation. The patented 17-4PH stainless steel anti-rotation tabs ensure rock-solid stability, allowing seamless attachment of lights, grips, and optics without compromising accuracy.
- Nitride/Melonite Barrel Finish: 14.5-inch government/SOCOM profile barrel treated for enhanced corrosion resistance and extended barrel life, promoting consistent accuracy even after thousands of rounds.
- Mid-Length Gas System: Optimized for 5.56 NATO cartridges, this system balances reliability and recoil management, making it suppressor-ready while minimizing wear on internal components.
- Precision-Machined Upper Receiver: Forged from high-grade aluminum, ensuring a tight fit and flawless compatibility with standard AR-15 lowers for a seamless assembly.
Specifications
- Caliber: 5.56 NATO
- Barrel Length: 14.5 inches
- Barrel Profile: Government / SOCOM
- Twist Rate: 1:7
- Gas System: Mid-Length
- Barrel Finish: Nitride / Melonite
- Handguard: CMT UHPR Mod 2 HDX, 15-inch M-LOK
- BCG / Charging Handle: Not Included
- Weight: 64 oz
- Overall Length: 23.5 inches
Why Choose This Product
For shooters seeking a reliable 14.5-inch 5.56 NATO AR-15 upper assembly, the NBS Premium Series stands out by addressing common pain points like inconsistent cycling and handguard flex. The robust CMT handguard provides ample rail space for customization, while the nitride barrel ensures longevity in harsh conditions. Whether you’re building for tactical versatility or precision at 300 yards, this upper offers value-driven performance that rivals premium brands without the premium price tag. Its lightweight design reduces fatigue during extended use, and the mid-length setup excels in both suppressed and unsuppressed configurations for all-around adaptability.
Elevate your rifle today with the NBS Premium Series upper assembly. Compatible with most AR-15 platforms, it’s the perfect foundation for your next build—order now and experience enhanced accuracy and control on the range.





