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Build an ultra-compact AR pistol or SBR with the PRO2A 7.5" 223/5.56 Pistol Length Melonite M-LOK Upper Kit. This 100% American-made master bundle includes a 4150 CMV steel barrel, 7075-T6 forged receiver, pre-headspaced BCG, lower parts kit, and pistol buffer assembly.
| Upper Receiver Assembly | Mil-Spec Forged 7075-T6 Aluminum, M4 Feed Ramps, Forward Assist & Port Cover, Type III Hardcoat Anodized |
|---|---|
| Bolt Carrier Group | Full M16 Profile, Nitride/Melonite Treatment, Properly Staked Gas Key, MPI Tested |
| Charging Handle | Standard Milspec Charging Handle |
| Barrel | 7.5 Inch, 4150 Chrome Moly Vanadium Steel, Medium Profile, Melonite Treated |
| Caliber | 223 Wylde (Accepts .223 Remington and 5.56 NATO) |
| Twist Rate | 1:7 Twist |
| Gas Operating System | Pistol-Length Gas System, Low-Profile 4140 Gas Block |
| Muzzle Device | Standard A2 Flash Hider, 1/2x28 Thread Pitch |
| Handguard Rail | 7 Inch Slim Competition Top Free-Float Aluminum M-LOK Handguard |
| Lower Receiver Parts Kit | Mil-Spec Spring/Pin Kit, Polished Single-Stage Trigger, Standard A2 Grip and Milspec Lower Parts |
| Brace | Standard Blade, AR-15 Pistol Buffer Tube, 3oz Carbine Buffer, Spring, Latch Plate, Castle Nut |
| Manufacturing Origin | Assembled in the USA with Lifetime Warranty |
The PRO2A 7.5" Master Kit delivers system synergy by headspacing the M16 bolt carrier group to the 7.5-inch Melonite barrel and matching it with compatible lower hardware, eliminating the cycling issues common in custom-assembled micro builds.
