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Unlock optimized muzzle velocity, enhanced long-range consistency, and premium ergonomics with the PRO2A 18" Mid 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 precision tactical asset. By replacing the traditional rear charging handle with a stationary, left-side manual handle, this setup clears interference beneath large rifle scopes. Built around a premium 18-inch 4150 CMV steel barrel with a highly adaptable 1:8 twist rate, this kit features an optimized mid-length gas block, 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 Assembly | 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 (BCG) | 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 | 18 Inch Profile, 4150 Chrome Moly Vanadium (CMV) Steel, Heavy/Medium Contour, Melonite Treated Interior & Exterior Bore |
| Caliber | 5.56 NATO (Accepts .223 Remington) |
| Twist Rate | 1:8 Twist |
| Gas Operating Block & System | Mid-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 creates ergonomic bottlenecks. When you mount a large high-power scope over a standard rear-charging upper, manipulating the latch becomes clumsy and awkward. The PRO2A 18" 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 mid-length gas port block and an all-inclusive component layout that works seamlessly right out of the box, this kit provides target shooters and hunters with a premium, multi-purpose rifle build without charging individual part premiums.
| SKU | P2ANR556AX15MID18-TK-KIT |
|---|---|
| Barrel Length | 18 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
