Accessories for Mossberg JM 940

The Mossberg JM 940 is the updated JM Pro competition shotgun, with an improved gas system and enhanced competition-ready features over the JM 930. The accessory range for the JM 940 covers all three variables that directly determine how the gun fits and performs across an IPSC Shotgun stage.

Upgrades for the Mossberg JM 940

The Mossberg JM 940 can be tailored across the main competition upgrade areas:

• Stocks – an adjustable stock dials in length of pull and cheek height so the gun mounts the same way every time.
• Handguards and forends – a replacement forend changes where and how your support hand drives the gun, improving control through fast transitions.
• Tube extensions – a magazine tube extension adds shell capacity beyond the factory limit, so fewer reloads break up a stage.
• Red dot mounts and sights – a mounted optic gives a single focal plane for faster acquisition without permanent changes to the receiver.
• Cheek rests – a raised cheek piece keeps your eye consistently behind the optic on every mount.
• Charging handles and controls – enlarged controls are faster and surer to operate under speed.

Compatibility is specific to each model — confirm the fit on the individual product page before ordering.