PRO2A 11.5" 5.56 NATO Carbine Length Melonite M-LOK AR-15 Upper

PRO2A 11.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A 11.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper delivers definitive close-quarters operational performance combined with rugged structural endurance. This upper assembly transitions the traditional rifle architecture into a fast-handling, compact pistol or SBR platform. Engineered with a premium 11.5-inch Melonite-treated barrel, this system delivers the ideal combination of velocity retention and extreme handling control. It strikes the perfect intermediate balance for tactical deployment, close-quarters training configurations, or home-defense builds.

Key Features

Maneuverable 11.5-Inch Profile: Yields superior structural handling speeds and fast transition indexing in tight spaces while retaining standard duty-caliber capability.
Versatile 1/7 Twist Rate: Precision-rifled land profile optimized to rotationally stabilize a vast array of common 5.56mm projectiles, including heavy mil-spec or defensive grain variations.
QPQ Melonite Surface Hardening: Premium Salt Bath Nitride treatment shields internal rifling and external steel surfaces against corrosive moisture, rapid thermal wear, and mechanical friction.
Reliable Carbine-Length Gas Layout: Smooth direct-impingement cycling dynamics tuned for duty reliability under stressful, rapid-fire operational strings.
Free-Float Modular Slim Handguard: Enhances intrinsic shot-to-shot accuracy by isolating barrel harmonics while supplying full M-LOK accessory alignment slots and an expansive top Picatinny tracking rail.

Technical Specifications

Caliber / Chamber:	5.56 NATO (Accepts .223 Remington reliably)
Barrel Length & Contour:	11.5 Inches Medium Profile
Barrel Material:	4150 Chrome Moly Vanadium (CMV) Steel
Twist Rate:	1:7 Twist
Barrel Coating Finish:	QPQ Melonite / Black Nitride Corrosion-Resistant Exterior and Interior Lining
Gas System Length:	Carbine-Length Gas System with 0.750" Low Profile Gas Block
Upper Receiver Type:	7075-T6 Forged Aluminum M4 Flat Top Receiver, M4 Feed Ramps, Forward Assist & Port Cover (Type III Hardcoat Anodized)
Handguard Profile:	10 inch Slim Free-Float Modular M-LOK Rail Layout
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

When selecting a short-barrel setup for an AR-15 platform, the 11.5-inch barrel standard provides significant performance advantages over ultra-short variants. This specific length extends gas system dwell time, lowering system wear, softening recoil, and massively increasing mechanical cycling reliability under harsh firing conditions. Additionally, it preserves essential muzzle velocity parameters required for dependable bullet expansion and structural performance at realistic defensive ranges.

Enveloped in an ultra-durable QPQ Melonite anti-corrosion barrier, matched with a rugged mil-spec forged receiver, and finished with a lightweight free-float M-LOK rail system, this drop-in platform strips away configuration headaches. Built completely from high-grade US components, the PRO2A 11.5-inch upper delivers an out-of-the-box tactical system engineered for long-term service life and unflinching precision.

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