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Bring hard-hitting, intermediate-power performance to an ultra-compact footprint with this premium 100% American-made upper receiver assembly. The PRO2A 7.5" 7.62x39 Pistol Length NR Side Charging Upper anchors a match-ready, premium Melonite-treated 4150 CMV barrel to a high-end Gibbz Arms G4 non-reciprocating billet upper receiver optimized for maximum maneuverability. Complete with an optimized pistol-length gas operating block, a slim free-float M-LOK handguard, a pre-headspaced premium side-charging bolt carrier assembly with an enhanced firing pin, and a standard muzzle device, this assembly delivers everything required to seamlessly convert any standard stripped lower receiver into a responsive personal defense weapon or hard-hitting sub-compact asset.
| Upper Receiver | Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black |
|---|---|
| Charging Style | Left-Side Non-Reciprocating Manual Cocking Handle Assembly (Stays Stationary While Firing) |
| Barrel Length & Steel | 7.5 Inch Profile, 4150 Chrome Moly Vanadium (CMV) Steel, Medium Contour, Melonite Treated |
| Caliber | 7.62x39mm |
| Twist Rate | 1:10 Twist (Optimized for standard 122gr to 124gr projectiles and heavy intermediate loads) |
| Gas Operating Block | Pistol-Length Direct Impingement System, Low-Profile 0.750" Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | Standard 5/8x24 Thread Pitch, A2 Birdcage Flash Hider with Crush Washer |
| Handguard | 7 Inch Slim Profile Free-Float M-LOK Rail, Competition Top Picatinny Rail, Machined from 6061-T6 Aluminum |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The PRO2A 7.5" 7.62x39 Pistol Length NR Side Charging Melonite Upper directly solves the three biggest hurdles facing intermediate sub-compact builders: light primer strikes on surplus ammunition, uncomfortable rear manual configurations, and part-by-part home building variations. While generic 7.62x39 AR builds frequently experience feeding failures and weak primer ignition due to out-of-spec components, Pro2A Tactical builds this system around an enhanced firing pin and a tailored direct impingement gas block. This setup ensures relentless extraction cycles out of the box while keeping your training and range costs incredibly low by smoothly devouring steel-cased ammo.
Moving your manual charging interface to a static side layout fundamentally accelerates your manipulation speeds. You can comfortably charge the chamber or cycle clearing paths from a natural firing position without disrupting your optical line of sight, breaking your cheek weld, or reaching over the top of massive target turrets. Opting for a 7.5-inch medium contour barrel path offers a massive physical advantage for operators who prioritize high-energy tactical defense within tight confines. It provides an exceptionally light, nimble muzzle profile that navigates around home defense barriers or vehicle interiors effortlessly, while still ensuring the heavy 7.62x39 cartridge delivers devastating energy downrange compared to standard 5.56 variants of a similar length. Backed completely by Pro2A Tactical's signature Lifetime Factory Warranty and engineered with 100% American craftsmanship, this complete upper receiver assembly converts your platform into a high-performance, duty-ready asset with absolute confidence.
| SKU | P2ANRX39ACT7PIS75-HT |
|---|---|
| Barrel Length | 7.5 inch |
| Rifle Caliber | 7.62x39 |
| Manufacturer | Pro2A Tactical |