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Maximize the full ballistic efficiency and handling potential of the 300 AAC Blackout cartridge. The PRO2A 12.5" 300 Blackout Pistol Length Non-Reciprocating (NR) Side Charging Melonite Upper Kit is a comprehensive, range-ready build solution that bundles a complete upper assembly with a premium matching side-charging bolt carrier group (BCG). By shifting manual controls to an intuitive, left-side cocking lever, this upper lets you cycle the action seamlessly without taking your eyes off your optics. The non-reciprocating handle stays fully stationary while firing, providing an optimized operational zone free from moving external components. Built around a versatile 12.5-inch barrel configuration, this kit provides extra velocity scaling over micro setups, maximizing powder burn for supersonic loads while remaining exceptionally reliable with heavy sub-sonic ammo. Drops natively onto any standard Mil-Spec lower receiver configured as a legal pistol or registered SBR. Proudly 100% designed, machined, and precision-assembled in the USA.
| Upper Receiver | Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black |
|---|---|
| Bolt Carrier Group | Premium M16 Full Auto Profile, Nitride Finish, 9310 Bolt |
| Barrel Length & Steel | 12.5 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel, Melonite Treated |
| Caliber | 300 AAC Blackout (300 BLK) |
| Twist Rate | 1:8 Twist (All-around stabilization for supersonic and heavy sub-sonic ammo) |
| Gas Operating Block | Pistol-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device Config | Standard 300 BLK Thread Pitch (5/8-24 Threads), A2 Birdcage Flash Hider with Crush Washer |
| Handguard | 10" Slim Profile Free-Float M-LOK Rail, Machined from 6061-T6 Aluminum |
| Lower Parts | Milspec Polished Trigger & Hammer, Standard Grip & Milspec Lower Parts Kit |
| Brace | Standard Blade with pistol buffer tube, 3oz buffer, buffer spring, latch plate and castle nut |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
Enthusiasts building a dependable personal defense weapon prefer the simplicity of an all-inclusive kit. Bypassing the mechanical headache of headspacing raw bolts or selecting individual gas keys, it provides an American-made, ready-to-pin factory package.
Hog and predator hunters running bulky low-power variable optics (LPVOs), thermal systems, or complex night vision frames prefer side-charging platforms. The left-side handle clears the wide undersides of scope mounts, protecting hands from scrape damage.
Shooters planning to attach a silencer choose this solid side-charging platform. The enclosed billet design eliminates the open space found under standard rear charging tabs, keeping backpressure blowback completely away from the shooter's breathing zone.
| SKU | P2ANR300BW10PIS125-TK-KIT |
|---|---|
| Rifle Caliber | 300 Blackout |
| Manufacturer | Pro2A Tactical |
