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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.
BARREL: 1:7 or 1:5 Twist Rate. Special 1:5 Twist Rate is designed to stabilize heavier grain bullets.
Maximize the tactical potential of the 300 AAC Blackout cartridge with an intuitive, side-charging manual layout. The PRO2A 7.5" 300 Blackout Pistol Length Non-Reciprocating (NR) Side Charging Upper Assembly updates traditional frame mechanics by replacing the standard rear pull tab with a left-side charging lever. The handle stays fully stationary during live-fire cycling, providing a reliable operational zone free from moving external components near your optic space or support grip. Tuned around a compact 7.5-inch barrel configuration with your choice of a versatile 1:7 twist or a lightning-fast 1:5 twist for short-profile heavy stabilization, this drop-in upper receiver assembly is purpose-built to mount directly onto any standard Mil-Spec lower receiver. 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 | 7.5 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel |
| Caliber | 300 AAC Blackout (300 BLK) |
| Twist Rate | 1:7 Twist (Standard) OR 1:5 Fast Twist (Highly recommended for sub-sonic suppressor use) |
| 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 | 6.5" Slim Profile Competition Top Free-Float M-LOK Rail, Machined from 6061-T6 Aluminum |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
Shooters building a dedicated quiet platform prefer this 7.5-inch upper. The side-charging billet design seals the traditional rear handle opening, completely blocking backpressure gas blowback from leaking directly into the shooter's eyes when running a high-flow or traditional silencer.
Hog and predator hunters running bulky low-power variable optics (LPVOs), nocturnal digital arrays, or wide thermal sights prefer side chargers. The left-mounted handle leaves massive clearance space below the scope base, preventing scraped knuckles against large optical mounts.
Custom builders looking to construct a hard-hitting, compact home defense or backpack weapon choose this upper. Selecting the fast 1:5 twist ensures complete bullet stabilization in sub-7-inch envelopes, delivering heavy .30-caliber energy downrange out of a lightweight build.
| SKU | P2ANR300BLKAXC65PIS75-TK |
|---|---|
| Barrel Length | 7.5 inch |
| Rifle Caliber | 300 Blackout |
| Manufacturer | Pro2A Tactical |
