The Mossberg 940 JM Pro is a competition-ready 12 gauge semi-auto shotgun (brand part no. MOSG85165) built alongside champion shooter Jerry Miculek to run hard and run clean. A new gas system stretches the interval between cleanings out to roughly 1,500 rounds, while nickel boron-coated internal parts keep the action cycling smoothly under heavy competition use. The 24-inch matte blued vent-rib barrel pairs with a tungsten gray, drilled-and-tapped stainless steel receiver ready to accept an optic, and the adjustable black synthetic stock lets you dial in fit for faster, more consistent target acquisition. From 3-gun to steel challenge, the 940 JM Pro is built for shooters who need speed and reliability shot after shot.

Key Specifications

• Chambered in 12 gauge for serious competition-level power and follow-up speed.
• A 9+1 capacity keeps you shooting through stages without stopping to reload.
• The 24-inch matte blued vent-rib barrel is tuned for fast target acquisition on multiple targets.
• A competition-tuned gas system allows up to 1,500 rounds between cleanings, cutting downtime at the range.
• Nickel boron-coated internal parts keep the action running smoothly even after heavy round counts.
• The tungsten gray, drilled-and-tapped stainless steel receiver is ready to mount a red dot straight out of the box.
• A HiViz CompSight fiber-optic sight gives a fast, bright reference for rapid target transitions.
• Extended choke tubes are included for tuning pattern density to the stage or target.
• The tang safety sits within easy reach for quick, positive manipulation under time pressure.
• An adjustable black synthetic stock lets you set length of pull and comb height to your exact fit.

Frequently Asked Questions

Is the Mossberg 940 JM Pro optics-ready? Yes, the drilled-and-tapped stainless steel receiver is ready to mount a red dot optic without gunsmithing.

How many rounds does it hold? It ships with a 9+1 capacity, giving you plenty of rounds to run through a competition stage.

What is the barrel length? The 940 JM Pro wears a 24-inch matte blued vent-rib barrel built for fast swings between targets.

Buy the Mossberg 940 JM Pro

Pick up the Mossberg 940 JM Pro from our Lubbock, Texas gun shop and get it moving to your FFL with fast, insured shipping. It is a proven choice for semi-auto shotgun shooters running 3-gun and steel challenge who need a gun tuned to keep pace with the clock.