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NBS Premium Series 14.5" 5.56 NATO Upper Assembly w/ CMT UHPR Mod 2 HDX

NBS Premium Series 14.5" 5.56 NATO Upper Assembly w/ CMT UHPR Mod 2 HDX

NBS · Upper Parts

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Best price

$549.95at AR15Discounts

checked Oct 31, 2026

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AR15Discounts Best price $549.95checked Oct 31, 2026 Check store Buy at AR15Discounts
Dirty Bird $549.95checked Oct 31, 2026 Check store Buy at Dirty Bird

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Price history

Dashed line = out of stock. Tracking since Oct 28, 2026.

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AR15Discounts$549.95$549.95$549.95
Dirty Bird$549.95$549.95$549.95

Since Oct 28, 2026.

About this part

The NBS Premium Series 14.5" 5.56 NATO Upper Assembly w/ CMT UHPR Mod 2 HDX is an AR-15 upper part from NBS. It's sold by 2 stores, all at $549.95.

Fits and works with

Caliber
5.56 / .223 · Shop matching ammo
Bolt
Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer
NBS
Platform
AR-15

From the manufacturer

Elevate your AR-15 build with the NBS Premium Series 14.5" 5.56 NATO Upper Assembly featuring the CMT UHPR Mod 2 HDX handguard. Designed for tactical enthusiasts and precision shooters, this complete upper delivers exceptional reliability, accuracy, and modularity in a compact package. Whether you're outfitting a duty rifle or enhancing your personal defense setup, this assembly combines premium components for superior performance without the bulk. Key Features High-Quality Barrel Construction: 14.5-inch 5.56 NATO barrel with Nitride/Melonite finish for enhanced corrosion resistance and smoother operation, reducing wear during extended use. Advanced Handguard System: Equipped with the Cross Machine Tool (CMT) UHPR Mod 2 HDX free-float handguard, featuring M-LOK slots on all sides for versatile accessory mounting, anti-rotation tabs for secure fit, and integrated QD sling points for quick attachment. Optimized Gas System: Mid-length gas system paired with a Government/SOCOM profile barrel to balance recoil management and reliability, ideal for suppressed or unsuppressed configurations. Modular Design: Built on a mil-spec upper receiver compatible with standard AR-15 lowers, allowing seamless integration into your existing platform. Technical Specifications Barrel Length: 14.5 inches Caliber: 5.56 NATO Barrel Finish: Nitride/Melonite Barrel Profile: Government/SOCOM Gas System: Mid-length Twist Rate: 1:7 Handguard Length: Optimized for 14.5-inch barrel Inner Handguard Diameter: 1.315 inches Weight: 64 ounces Dimensions: 23.5 inches long x 5 inches wide x 5 inches high BCG/Charging Handle: Not included - customize with your preferred components Why Choose This Upper Assembly? This NBS Premium Series upper addresses common challenges in AR-15 builds, such as balancing maneuverability with effective range. The 14.5-inch barrel provides the velocity needed for 5.56 NATO rounds out to 500 yards while keeping the overall length compact for close-quarters handling. The CMT UHPR Mod 2 HDX handguard offers lightweight strength with 17-4PH stainless steel mounting for rock-solid accessory retention, eliminating wobble and ensuring consistent shot placement. Users appreciate its durability in demanding environments, from range days to tactical training, making it a smart investment for reliability without compromise. Ready to upgrade? Integrate this premium upper into your AR-15 for unmatched precision and versatility - build the rifle that meets your exact needs today. Frequently Asked Questions Q: Is the BCG and charging handle included? A: No, the BCG and charging handle are not included, allowing you to select components that best suit your build preferences. Q: What accessories can I mount on the handguard? A: The CMT UHPR Mod 2 HDX features M-LOK slots on all flat sides, compatible with lights, grips, lasers, and other standard M-LOK accessories for full customization. Q: Is this upper compatible with my existing AR-15 lower? A: Yes, it's built to mil-spec standards, ensuring drop-in compatibility with most standard AR-15 lower receivers.

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$549.95 at AR15Discounts
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