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Unlock true flat-shooting, medium-to-long range ballistic performance out of your left-handed AR-15 platform with this premium 100% American-made conversion system. The PRO2A LEFT HAND 12.5" 6.5 Grendel Master Kit anchors a match-ready, premium Melonite-treated 4150 CMV barrel to a true left-handed Gibbz Arms G4 non-reciprocating billet upper receiver. Complete with a smooth carbine-length gas block system, a slim free-float M-LOK handguard, a pre-headspaced left-handed side-charging bolt carrier assembly, and a full matching lower build component package, this kit delivers everything required to seamlessly transform any standard stripped lower receiver into an optimized hunter or precision platform.
| Upper Receiver | Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black |
|---|---|
| Charging Style | Left-Side Non-Reciprocating Manual Cocking Handle Assembly (Stays Stationary While Firing) |
| Bolt Carrier Group | Premium Milspec, Nitride/Melonite Finish, M16 Carrier, Properly Staked Gas Key, MPI Tested, Equipped with Correct 6.5 Grendel Type II Bolt face |
| Barrel Length & Steel | 12.5 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated |
| Caliber | 6.5 Grendel (Type II Face Depth of .136") |
| Twist Rate | 1:8 Twist (Optimized to stabilize standard range, match, and hunting bullet profiles) |
| Gas Operating Block | Carbine-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | Standard 5/8x24 Thread Pitch, A2 Birdcage Flash Hider with Crush Washer Pre-Installed |
| Handguard | 10 Inch Slim Profile Free-Float M-LOK Rail, Full-Length Top Picatinny Rail, Machined from 6061-T6 Aluminum |
| Lower Parts Kit | Mil-Spec Polished Trigger & Hammer, Standard Pistol Grip, Lower Component Springs, and Pins Included |
| Brace Assembly | Standard Blade with pistol buffer tube, standard 3oz buffer, buffer spring, latch plate, and castle nut |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The PRO2A LEFT HAND 12.5" 6.5 Grendel NR Side Charging Melonite Upper Kit directly solves the three biggest hurdles facing precision long-range builders: optimizing left-handed ergonomics, establishing comfortable manual manipulations beneath large optics, and part-by-part home building tolerances. While traditional setups force left-handed shooters to tolerate gas vents drifting directly toward their eyes and hot brass arcing across their visual workspace, our true mirrored left-eject mechanism sets an unobstructed field of view. This arrangement balances internal carrier velocities, generating an incredibly soft impulse that lets you track impacts through your optic continuously without losing your frame.
Moving your manual charging interface to a static side layout fundamentally accelerates your manipulation speeds. You can comfortably charge the chamber or cycle clearing paths from a natural firing position without disrupting your optical line of sight, breaking your cheek weld over the stock, or reaching over the top of massive target turrets. Furthermore, by investing in a comprehensive, complete build kit rather than piecing your components together block-by-block, you eliminate dangerous headspace variations and tracking issues between distinct manufacturers. Backed completely by Pro2A Tactical's signature Lifetime Factory Warranty and engineered with 100% American craftsmanship, this master kit converts your stripped lower receiver into a premium, duty-ready asset with absolute confidence.
| SKU | P2ALNR65GBW10CAR125-TK |
|---|---|
| Barrel Length | 12.5 inch |
| Rifle Caliber | 6.5 Grendel |
| Manufacturer | Pro2A Tactical |
