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OPTION DETAILS
GAS BLOCK: Standard or Adjustable. Adjustable is a great option if you are using a suppressor or just want to fine tune your system.
MUZZLE DEVICE: Standard A2 Flash Hider or Competition Muzzle Brake. Muzzle Brakes are for recoil reduction. The baffles and ports are milled larger to drive pressure up and to keep the muzzle down more effectively.
Bolt Carrier Group: BCG is Optional. Select Nitride or Nickel Boron if you need a BCG to complete Upper . All our BCGs are M16 Profile, Properly Staked Gas Key, MP Tested, 8620 Carrier, 9310 Bolt. Nitride is a surface hardening process that creates a tough and slick surface. Nickel Boron provides the slickest surface which reduces friction and where dirt does not easily adhere to.
Unlock the ideal balance of velocity and compact geometry with an intuitive side-charging setup. The PRO2A 8.5" 300 Blackout Pistol Length Non-Reciprocating (NR) Side Charging Upper Assembly delivers modern ergonomics by moving manual operations to a heavy-duty, left-side cocking lever. The handle remains completely stationary while firing, providing a seamless operating zone free from moving external components near your optic mount. Built around an 8.5-inch barrel—universally recognized as the optimal length for full powder combustion in the 300 BLK envelope—this drop-in upper receiver assembly drops natively onto any 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 |
|---|---|
| Barrel Length & Steel | 8.5 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel |
| Caliber | 300 AAC Blackout (300 BLK) |
| Twist Rate | 1:7 Twist |
| Gas Operating Block | Pistol-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | Standard 300 BLK Thread Pitch (5/8-24 Threads), A2 Birdcage Flash Hider with Crush Washer |
| Handguard | 7" Slim Profile Free-Float M-LOK Rail, Machined from 6061-T6 Aluminum |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
Enthusiasts building an agile close-quarters tool choose this 8.5-inch setup. It yields full powder burn and optimal velocity within a highly maneuverable envelope, offering maximum lethality in a tight home-defense environment.
Hog and predator hunters utilizing 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 | P2ANR300BLKGFS7PIS85-TK |
|---|---|
| Barrel Length | 8.5 inch |
| Rifle Caliber | 300 Blackout |
| Manufacturer | Pro2A Tactical |
