JRC Gen3 10mm Auto | 17″ Threaded Barrel | Glock Mag

The Just Right Carbines (JRC) Gen3 is a semi-automatic AR-style pistol-caliber carbine chambered in 10mm Auto. It is built for shooters who want a Glock-magazine-compatible carbine with configurable ambidextrous controls and a threaded 17″ barrel for accessory muzzle devices. A compact low-power variable optic such as the Vortex Strike Eagle 1-6×24 pairs well with this platform for both close-quarters transitions and mid-range shots. Typical applications include range training and pistol-caliber carbine competition.

Product Specifications

• The manufacturer is Just Right Carbines (JRC).
• The model is listed as JRC Gen3.
• The caliber is 10mm Auto.
• The barrel measures 17 inches (threaded).
• The muzzle is threaded at 9/16×24 TPI.
• The rate of twist is 1:16.
• The action is Semi-Auto.
• The reported capacity is inconsistent across sources (15 vs 17 rounds).
• The magazine compatibility is accepts standard Glock magazines.
• The handguard type is inconsistent across sources (KeyMod vs M-LOK).
• The receiver material is machined from 6061 T6 aluminum.
• The stock is 6-position adjustable, synthetic, black.
• The rifle ships with no sights installed.
• The overall length is listed as 31–34.25 inches (adjustable stock).
• The UPC is 703669117460.

The JRC Gen3 presents a pragmatic, feature-forward take on the pistol-caliber carbine concept: ambidextrous controls, compatibility with widely available Glock magazines, and a threaded 17″ barrel allow owners to tailor the platform with common accessories. The build uses standard AR-15 furniture and buffer tube components for easy customization, and the-machined aluminum receiver provides a stable mounting platform for optics and rails. If you want a straightforward, adaptable 10mm carbine for range drills and PCC matches, this configuration is practical and serviceable.