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The Pro2A Tactical 10.5-inch .450 Bushmaster Non-Reciprocating (NR) Side Charging Complete Upper Kit with Flash Can delivers exceptional tactical ergonomics, advanced blast routing, and optimized recoil management to the AR-15 big-bore platform. Assembled by hand and verified for concentricity in Georgia, this premier conversion layout integrates a rigid billet receiver that replaces the traditional rear charging handle with an advanced, static side-charger mechanism. Paired with a linear flash can that pushes muzzle blast and heavy straight-wall concussion safely downrange, this comprehensive build kit arrives fully populated with a matching side-charging big-bore bolt group, full lower parts kit, and optimized heavy buffer stock assembly to streamline your transition into a premium weapon platform.
| Upper Receiver | Patented Gibbz Arms G4 Billet Aluminum Non-Reciprocating Side Charging Upper Receiver, Enlarged Ejection Port for Big Bore Calibers, Single Large Feed Ramp (Type III Hardcoat Anodized) |
| Charging System | Left-Side Non-Reciprocating Charging System (Static Handle Design) |
| Barrel Length & Profile | 10.5-Inch Heavy Profile |
| Caliber | .450 Bushmaster |
| Twist Rate | 1:24 Twist |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with Premium Corrosion-Resistant Melonite Finish |
| Gas System Length | Carbine Length Direct Impingement with 0.750 Low-Profile Gas Block |
| Handguard | 12 Inch Free Float Slim Profile M-LOK Rail System with Integrated Top Picatinny Rail |
| Muzzle Thread & Device | 5/8x24 Thread Pitch Slim Line Aluminum Flash Can |
| Bolt Carrier Group | Complete .450 Bushmaster Full Auto Bolt Carrier Group (Nitride Processed / Bolt MPI Tested) |
| Lower Parts Kit | Complete AR-15 LPK with Pins, Springs, Detents, Grip, and Polished Mil-Spec Fire Control Group |
| Stock Assembly | Pistol Buffer Tube Assembly, Carbine Buffer, Spring, Castle Nut, Endplate, and Adjustable High Density Polymer Blade |
Assembling a high-performance big-bore AR setup demands rigid mechanical compliance, as straight-walled loads put severe pressure demands on standard operational cycles. The Pro2A 10.5" .450 Bushmaster NR Side Charging Upper Kit with Flash Can solves these layout limitations entirely by grouping a factory-headspaced nitrided side-charging bolt group with a reliable carbine-length gas system, a forward-directing muzzle layout, and a complete lower build kit. The static side-charging handle yields crucial clearance for modern, oversized optics while maximizing operational speed from prone or benched positions. Built with professional case-hardening surface treatments to preserve bore life and guarantee effortless maintenance, it is the ultimate option for tactical operators demanding maximum custom-tier rigidity in a turnkey package.
| SKU | P2ANR450BAX12CAR105CAN-TK-KIT |
|---|---|
| Barrel Length | 10.5 inch |
| Rifle Caliber | 450 Bushmaster |
| Manufacturer | Pro2A Tactical |