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The PRO2A 13.7" 5.56 NATO Mid Length Melonite M-LOK Upper Kit with Pinned & Welded Muzzle Device is a comprehensive rifle build package that includes a bolt carrier group, charging handle, lower parts kit, and buffer assembly.
| Upper Receiver | Milspec 7075-T6 Forged Aluminum, M4 Feed Ramps, Forward Assist & Dust Cover, Anodized Black |
|---|---|
| Barrel Length | 13.7-Inch Barrel (Permanently achieves 16-Inch Overall Length via Pinned & Welded muzzle device) |
| Caliber | 5.56 NATO (Safely accepts .223 Remington) |
| Twist Rate | 1:7 Twist |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish |
| Gas System | Mid Length Direct Impingement with Low-Profile Gas Block |
| Handguard | 12-Inch Extended Free Float Slim Profile M-LOK Handguard Rail System |
| Muzzle Device | "Pro2A Flash Guardian" 3 Prong Flash Hider (Permanently Pinned and Welded / 1/2x28 Thread Base) |
| Bolt Carrier Group | M16 Profile, Heavy Duty Bolt Carrier Group, Nitride Treated, Properly Staked Gas Key |
| Charging Handle | Milspec Standard Charging Handle |
| Lower Parts Kit | Complete AR-15 Lower Parts Kit (LPK) with Fire Control Group, Grip, and Milspec Trigger Setup |
| Stock Assembly | 6-Position Adjustable Carbine M4 Stock with Buffer Tube, Buffer Spring, Castle Nut, and Receiver End Plate |
This kit delivers the handling benefits of a short-barreled rifle while maintaining a non-NFA 16-inch legal length via a pinned and welded muzzle device. Combined with a durable Melonite finish and smooth mid-length gas system, it serves as a practical solution for your next AR-15 build.
| SKU | P2A556AX12MID137-BA-KIT-PW |
|---|---|
| Barrel Length | 13.7 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
