The Just Right Carbines JRC Gen 3 Quadrail .40 S&W pistol-caliber carbine is built around a straight blowback action and designed for compatibility with Glock and Glock-compatible magazines. This 17 in threaded-barrel configuration features a free-floating quadrail forend, a Picatinny top rail, and an adjustable quick-release buttstock for practical handling.
Key Features
Straight blowback operation in .40 S&W for reliable pistol-caliber carbine use
17 in threaded barrel with 9/16-24 right-hand threads and a thread protector
Free-floating quadrail for comfortable accessory mounting
Picatinny rail machined into the top of the receiver
Accepts Glock and Glock-compatible magazines for straightforward ammo and magazine sourcing
Adjustable quick-release buttstock with commercial buffer tube setup
If you’re looking for a rail-equipped .40 S&W pistol-caliber carbine with a threaded barrel and Glock-compatible magazine support, the JRC Gen 3 Quadrail is ready for accessory customization.
