PRO2A 18" 308 Win 1/10 Rifle Length Melonite M-LOK AR-10 Upper

Product Overview

The PRO2A 18" 308 Win 1/10 Rifle Length Melonite M-LOK AR-10 Upper delivers an outstanding balance of hard-hitting terminal energy, long-range accuracy, and exceptionally smooth cycling. Engineered explicitly as a **standalone barreled upper receiver assembly only**, this 18-inch DPMS High Profile pattern top end optimizes the powder burn efficiency of the venerable .308 Winchester cartridge. The full rifle-length gas subsystem ensures a soft recoil impulse and reduced structural wear compared to over-gassed shorter configurations.

NOTE: MUST BE PAIRED with our Pro2A Tactical Stripped or Complete AR-10 Lower Receivers for seemless compatibility and trouble free fitment. As there is NO milspec standard for the AR-10 Platform, we do not guarantee fitment with other manufacturer's AR-10 Lower Receivers.

Key Features

Optimized 18-Inch Ballistic Profile: Squeezes out excellent downrange ballistic velocity and flat trajectories while maintaining a highly maneuverable handling weight for hunting and field applications.
Smooth Rifle-Length Gas Loop: Significantly lowers pressure spikes and gas port erosion velocity, ensuring a softer recoil impulse and faster target tracking re-acquisition.
Precision 1:10 Twist Stabilization: Highly optimized to reliably stabilize a broad operational spectrum of multi-grain bullets, from standard 147gr range ammunition to heavy 168gr and 175gr match-tier options.
Liquid QPQ Melonite Preservation: A premium, sub-surface liquid nitriding treatment shields the 4150 CMV steel barrel against extreme thermal attrition, throat wear, and severe weather moisture.
Free-Floating M-LOK Handguard: Features a rigid profile, slim modular rail system aligned flat with the upper top rail, optimizing bipod and accessory attachment options without distorting barrel harmonics.

Technical Specifications

Upper Receiver	AR-10 DPMS Pattern (DPMS High Profile), Billet 7075 Aluminum, Forward Assist & Dust Cover, Type III Hardcoat Anodized Black
Barrel Length & Profile	18-Inch Heavy Contour
Caliber	.308 Winchester (Safely accepts 7.62x51mm NATO)
Twist Rate	1:10 Twist Rate (Optimized for standard and heavy match-grade projectiles)
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Melonite/QPQ Treatment - Made by Ballistic Advantage
Gas System	Rifle Length Direct Impingement with Low-Profile Gas Block
Handguard	15-Inch Free Float Slim Profile M-LOK Rail System (Ensures clean accessory clearance and bipod stability)
Muzzle Device	Competition Muzzle Brake with Crush Washer (5/8x24 Thread Pitch)

Why Choose This Product

Choosing this standalone 18-inch .308 Win barreled upper receiver assembly provides an economical, heavy-hitting pathway to long-range customization, eliminating the cost of redundant workspace components. By combining the softened recoil impulse of a rifle-length gas subsystem with an ultra-durable precision-rifled Melonite barrel, this configuration maximizes structural longevity and accuracy under sustained strings of fire. Aligned precisely to the industry-standard DPMS High pattern, it integrates flawlessly with your favorite lower receivers and custom optics furniture. Proudly manufactured 100% in the USA from heavy-duty raw metals, it ensures field accuracy right out of the box.