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Maximize the velocity limits and long-range ballistic performance of the 5.56 cartridge with the PRO2A 22" Rifle Length Non-Reciprocating (NR) Side Charging M-LOK Upper Kit. This 100% American-made master build bundle contains every critical component required to transform a standard stripped lower receiver into a high-velocity precision rifle. By shifting the manual action to a stationary, left-side location, this system provides uninterrupted clearance for large, high-power optics and scopes. Built around a premium, extra-long 22-inch 4150 CMV steel barrel with a heavy-stabilizing 1:7 twist rate, this kit features an optimized rifle-length gas system, a pre-headspaced side-charging bolt carrier group, a complete lower parts kit (LPK), and a matching 6-position adjustable carbine buffer stock assembly.
| Upper Receiver | Gibbz Arms G4 Premium Non-Reciprocating Side Charging Billet Upper Receiver, M4 Feed Ramps, Left-Side Charging Slot Cutout, Type III Hardcoat Anodized Black Finish |
|---|---|
| Bolt Carrier Group | Milspec M16 Profile, 9310 Steel Bolt Face, Nitride Finish, 8620 Steel Carrier, Properly Staked Gas Key & MPI Tested |
| Charging Handle | Left-Side Non-Reciprocating Charging Handle Assembly (Stationary During Firing Cycle) |
| Barrel Component | 22 Inch Profile, 4150 Chrome Moly Vanadium (CMV) Steel, Medium Contour, Melonite Treated Interior & Exterior Bore |
| Caliber | 5.56 NATO (Accepts .223 Remington) |
| Twist Rate | 1:7 Twist |
| Gas Operating Block & System | Rifle-Length Gas System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device Component | Standard 1/2x28 Thread Pitch, A2 Birdcage Flash Hider with Crush Washer Pre-Installed |
| Handguard Rail | 15 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Alignment, Modular M-LOK Attachment Points |
| Lower Receiver Parts Kit (LPK) | Complete Mil-Spec Spring and Pin Kit, Polished Single-Stage Hammer and Trigger Assembly, Standard A2 Pistol Grip |
| Carbine Buffer Stock Extension | Adjustable 6-Position M4 Stock, Mil-Spec Diameter Buffer Tube, Standard 3oz Carbine Buffer, and High-Tensile Buffer Spring |
| Manufacturing Origin | 100% Assembled and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty |
Building a high-velocity, long-range AR-15 often introduces ergonomic challenges. When you mount large, high-power magnification scopes over a standard rear-charging upper, manipulating the latch becomes clumsy and awkward. The PRO2A 22" 5.56 NATO Non-Reciprocating Side Charging Upper Kit directly solves this problem by utilizing an intuitive, left-side cocking mechanism that lets you cycle the weapon without shifting your head position or losing focus downrange. Paired with a soft-cycling rifle-length gas system that extracts maximum velocity from the 22-inch barrel and an all-inclusive component layout that works seamlessly right out of the box, this kit provides target shooters, varmint hunters, and precision enthusiasts with a premium long-range setup without individual part premiums.
| SKU | P2ANR556AX15RIF22-TK-KIT |
|---|---|
| Barrel Length | 22 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
