Product Overview

The PRO2A 12.5" 300 Blackout 1/8 Pistol Length Melonite M-LOK AR-15 Upper delivers an exceptional balance of velocity, maneuverability, and reliable cycling. Engineered explicitly to maximizes the powder burn efficiency inherent to the .300 AAC Blackout cartridge, yielding improved kinetic energy delivery at extended ranges while remaining highly agile.

Key Features

• Core Receiver System Focus: Purified component build explicitly isolates the barreled upper assembly so you can reuse or independently choose your preferred tracking components.
• Optimized 12.5-Inch Ballistic Length: Earns increased muzzle velocity over micro configurations while preserving a highly responsive, compact operational handling profile.
• Versatile 1:8 Twist Profile: Flawlessly stabilizes a wide operational spectrum of ammunition, transitioning seamlessly from light supersonic training rounds to heavy subsonic configurations.
• Liquid QPQ Melonite Treatment: A high-performance nitriding process inside and out shields the 4150 CMV barrel against high friction heat, intense throat wear, and harsh weather elements.
• Free-Floating M-LOK Handguard: Features a slim-profile modular rail system aligned flat with the upper receiver top rail, optimizing accessory placement without shifting your barrel's point of impact.

Technical Specifications

Why Choose This Product

This standalone 12.5-inch barreled upper receiver assembly provides an economical pathway to high-performance customization, eliminating the cost of redundant workspace components. By focusing purely on a premium receiver, gas subsystem, and precision-rifled barrel layout, it allows you to utilize your preferred gear and lower furniture seamlessly. Made in the USA to unrelenting tactical tolerances, it delivers reliable, heavy-hitting field accuracy right out of the box.