Product Description

Unleash maximum low-signature capability and hard-hitting personal defense firepower from an incredibly compact platform with the premium PRO2A 5" 300 Blackout 1/5 Micro Length Melonite M-LOK AR-15 Assembled Upper Receiver with Flash Can. Explicitly configured as a standalone barreled upper assembly, this unit features a specialized 5-inch micro barrel engineered with an ultra-fast 1:5 rotational twist rate to fully stabilize heavy subsonic hunting bullets out of extremely short lengths. To effectively manage muzzle concussion and aggressive expansion gases inherent to micro builds, an integrated linear flash can is recessed inside the rail system, forcing all concussive energy straight downrange away from the operator.

Key Features

• Ultra-Fast 1:5 Twist Performance: Optimized explicitly for micro barrels running heavy subsonic loads, the quick 1:5 twist rate guarantees clean projectile stabilization, preventing keyholing and ensuring absolute accuracy downrange or through suppressors.
• Forward-Directed Flash Can: Slimline linear muzzle flash can captures aggressive short-barrel expansion blast, driving the acoustic reporting forward to maximize shooter comfort.
• Ultra-Compact Micro Footprint: A premium 5-inch heavy duty profile barrel yields an exceptionally small physical footprint perfect for personal defense weapon (PDW) builds, vehicle deployment, or discrete carry.
• QPQ Melonite Hardened Protection: Inside barrel bore, chamber throat, and exterior walls are fully liquid nitrocarburized to maximize surface hardness, improve thermal dissipation boundaries, and resist extreme environmental degradation.
• Recessed M-LOK Handguard Layout: A continuous top Picatinny rail aligns flawlessly with a 7-inch lightweight free-floating M-LOK handguard that beautifully shrouds and recesses the flash can muzzle profile for a clean, streamlined "tucked" aesthetic.

Technical Specifications

Why Choose This Product?

The PRO2A 5" 300 Blackout 1/5 Twist Upper Receiver with Flash Can provides custom builders with a highly specialized, micro-sized baseline without forcing the purchase of generic bolt carrier components or stock kits they may already have on hand. Stabilizing heavy subsonic projectiles out of a short barrel is notoriously difficult with standard twist rates. This system resolves that limitation out of the box by integrating an ultra-fast 1:5 twist profile that guarantees clean flight stabilization and ultimate safety for downstream setups. Complemented by a 7-inch free-floating rail that beautifully envelopes the blast-directing linear flash can, it delivers a flat-shooting, modern tuck-style profile engineered for absolute tactical reliability. Built in America to exacting manufacturing tolerances and guarded by an unconditional Structural Lifetime Warranty, it stands out as the ultimate choice for your next premium personal defense weapon configuration expansion.