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Experience advanced ergonomics, rapid structural manipulation, and the absolute shortest legal rifle blueprint possible without NFA tax stamp requirements. The PRO2A 13.7" 5.56 NATO Non-Reciprocating (NR) Side Charging Upper Kit with Flash Can completely redefines the AR-15 platform by shifting mechanical charging to a smooth, left-side layout while remaining static during firing cycles. An extended slimline flash can is permanently pinned and welded to the muzzle threads, successfully stretching the physical barrel length past the federal 16-inch minimum threshold. Operating on a tuned mid-length direct impingement setup, this configuration reduces felt recoil and system wear. The recessed flash can directs high-pressure muzzle blast and acoustic shockwaves straight downrange, while the 15-inch free-float M-LOK handguard provides a continuous, clean gripping surface. Complete with all lower receiver completion components and a rifle stock assembly, this turn-key package upgrades your stripped lower into an elite defensive carbine.
| Upper Receiver | Gibbz Arms G4 Billet Aluminum, Non-Reciprocating Left-Side Charging Configuration, Right-Hand Ejection Port, Type III Hardcoat Anodized Black |
|---|---|
| Charging Handle | Left-Side Non-Reciprocating Charging Handle (Stays static when firing) |
| Bolt Carrier Group | Milspec Side-Charging M16 Full Auto Profile, 5.56 NATO Caliber, QPQ Nitride/Melonite Treated, MPI Tested, 8620 Carrier with 9310 Steel Bolt |
| Barrel Length & Profile | 13.7-Inch Medium Profile (Brings overall length to 16.1 Inches via Pin & Weld) |
| Caliber | 5.56 NATO (Safely accepts both 5.56x45mm NATO and .223 Remington factory ammunition) |
| Twist Rate | 1:7 Twist Rate (Highly optimized for stabilizing standard 62gr to heavy 77gr match ammunition) |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish |
| Gas System | Mid Length Direct Impingement with Low-Profile Gas Block |
| Handguard | 15-Inch Free Float Slim Profile M-LOK Handguard Rail System |
| Muzzle Device | Extended Slimline Flash Can, 1/2x28 TPI, Permanently Pinned and Welded for Legal Compliance |
| Lower Parts Kit | Complete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Mil-Spec Fire Control Group (Trigger & Hammer Assembly) |
| Stock Assembly | M4 Carbine Adjustable Buttstock, 6-Position Mil-Spec Buffer Tube (Receiver Extension), Carbine Recoil Buffer, and Spring |
The 13.7-inch pinned and welded configuration yields a highly maneuverable weapon platform without forcing the shooter into a restrictive pistol brace classification or multi-month ATF waitlists. By updating this setup with a premium, non-reciprocating side-charging upper assembly, Pro2A Tactical provides lightning-fast clearing ergonomics and a forward-blast redirecting design. It is the ultimate turnkey custom rifle kit for shooters who prioritize speed, performance, and legal rifle compliance.
| SKU | P2ANR556GFS15MID137CAN-BA-KIT-PW |
|---|---|
| Barrel Length | 13.7 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |