Mossberg 940 JM Pro 12ga 24″ Optic-Ready Vent Rib

The Mossberg 940 JM Pro is a semi-automatic 12 gauge shotgun designed for competition and target shooting. It ships with a 24" vent-rib barrel and an optic-ready receiver cut for Shield RMSc-pattern micro dot sights. The stock is adjustable for length of pull and the design emphasizes rapid reloads and consistent cycling for sustained range use.

Key Specifications

• The action is Semi-Auto.
• The gauge is 12 Gauge.
• The barrel measures 24 inches and uses a vent-rib profile.
• The maximum chamber size is 3 inches.
• The barrel finish is Matte Blued.
• The receiver finish is Tungsten Gray Anodized.
• The stock is black synthetic with adjustable length of pull (13"–14.25").
• The shotgun includes Briley extended choke set and a cylinder tube.
• The sighting setup includes a HiViz CompSight fiber-optic front sight.
• The unloaded weight is approximately 7.75 lbs.

Built with competition features such as an optic-ready receiver, an enhanced gas system, and competition-style loading components, the 940 JM Pro provides a reliable platform for timed target work and serious range sessions. Its adjustable stock and fiber-optic sighting make it practical for shooters who require quick sight acquisition and a tailored fit. For those looking for a purpose-built competition shotgun with modern ergonomic and sighting options, this model offers a focused, no-nonsense package.