Just Right Carbines JRC Gen 3 9mm 17in M-LOK Rifle

The Just Right Carbines Gen 3 JRC is a semi-automatic pistol-caliber carbine configured for state compliance in CT, NJ, and MA. It features an ambidextrous design that allows the user to position the charging handle and ejector on either side, and it is built around standard AR parts for straightforward maintenance and customization. The rifle ships with a 17″ unthreaded parkerized 4140 chromoly barrel and a 13″ M-LOK compatible handguard.

For optics, a red-dot sight such as the Vortex SPARC AR pairs well with this platform and remains comfortably under a $1,000 price point while providing quick target acquisition for pistol-caliber carbine use. Typical applications include range training and recreational target shooting.

Product Specifications

• The manufacturer is Just Right Carbines.
• The model is the Gen 3 JRC M-LOK Rifle.
• The rifle is chambered in 9mm.
• The barrel measures 17 inches and is unthreaded.
• The barrel material and finish are parkerized 4140 chromoly.
• The handguard is a 13-inch M-LOK compatible design for accessory mounting.
• The carbine is ambidextrous, allowing the charging handle and ejector to be configured on either side.
• The design uses standard AR parts to simplify maintenance and upgrades.
• The top of the receiver includes a Picatinny rail for optics and accessories.
• The stock is a pinned buttstock on a standard M-4 buffer tube.
• The pistol grip is a standard AR-style pistol grip.
• The receiver, trigger housing, and magazine well are machined from aerospace-grade 6061 T6 aluminum.
• The overall length is 34.25 inches.
• The unloaded weight is 6.5 lbs.
• The rifle accepts M&P magazines (as indicated by the model designation) and is configured for CT/NJ/MA compliance.
• The UPC is 703669117583.

The Gen 3 JRC M-LOK is a practical, no-nonsense pistol-caliber carbine that balances straightforward handling with modularity. Its AR-compatible architecture and ambidextrous controls make it accessible to a wide range of shooters, and the 13″ M-LOK handguard provides ample real estate for lights, aimers, or foregrips. Whether used for deliberate practice at the range or general recreational shooting, this configuration focuses on reliability and serviceability.