The Mossberg 940 JM Pro is a 12-gauge semi-automatic shotgun built for competition use, especially 3-Gun and target shooting. It features an optic-ready receiver cut for Shield RMSc-pattern micro dot sights and a 24-inch vent-rib barrel for predictable sighting. Designed for speed and repeatable operation, the 940 JM Pro emphasizes durability and user-adjustable ergonomics for practical competition handling.
Key Specifications
- The shotgun is chambered in 12 Gauge for common competition and target loads.
- The action is a Semi-Auto gas system designed for reliable cycling in rapid-fire stages.
- The barrel measures 24 inches and features a vent rib profile for consistent sighting.
- The maximum chamber size is 3 inches, accommodating a range of 12-gauge shells compatible with the platform.
- The magazine and chamber configuration is listed as 9+1 capacity in the provided data.
- The reported unloaded weight is 7.75 lbs to balance carry and recoil control in competition use.
- The stock is an adjustable Multicam synthetic design with a length of pull listed as 13″–14.25″ for shooter fitment options.
- The receiver is documented as optic-ready for Shield RMSc-pattern micro dot sights and ships with a removable cover plate.
- The shotgun includes Hi-Viz fiber optic front sight and Briley extended choke(s) including a cylinder tube.
This configuration focuses on fast, repeatable operation and shooter adjustability for competitive environments. The optic-ready receiver and oversized controls support quick target transitions while the gas system and coated internal parts are intended to reduce maintenance frequency during heavy use. Ideal for serious competition shooters who want a purpose-built semi-auto platform with factory adjustments and accessory-ready features.
Not for sale to Illinois under PICA. Note that several U.S. jurisdictions limit magazine capacity to 10 rounds; these include Hawaii, California, Connecticut, the District of Columbia, Illinois, Maryland, Massachusetts, New Jersey, New York, Rhode Island, Vermont, Washington, and Colorado. Verify state and local laws before purchase or transfer.
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