# Mossberg 940 JM Pro 12 Gauge Shotgun - Tungsten Grey Finish **Brand:** Mossberg **Category:** Semi-Automatic Shotguns **Caliber:** 12 Gauge ## Specifications - **Caliber:** 12 Gauge - **Barrel Length:** 24" - **Capacity:** 4 rounds - **Finish:** Matte Blued - **Weight:** 116 oz - **Overall Length:** 45.5" - **UPC:** 015813851442 - **SKU:** UCHGDJA2 ## Description The Mossberg 940 JM Pro is a gas-operated semi-automatic 12-gauge shotgun with a 24" barrel, 4+1 capacity, and a 3" chamber. The receiver is steel with a tungsten grey anodized finish; the barrel and stock are black. Weight is 7.25 lbs. Sights are HiViz Comp Sight fiber optics. ### Key Specifications - **Model:** 940 JM Pro - **Caliber:** 12 Gauge - **Action:** Semi-Automatic - **Barrel Length:** 24 inches - **Capacity:** 4 + 1 rounds - **Weight:** 7.25 lbs. - **Receiver Material:** Steel - **Receiver Finish:** Tungsten Grey - **Finish Color:** Black - **Chamber Size:** 3 inches - **Sights:** HiViz Comp Sight Fiber Optic ### Detailed Features The gas-operated system cycles reliably across a range of loads and keeps recoil down compared to inertia-driven designs. HiViz Comp Sight fiber optics give you a bright, visible bead in variable lighting, a practical choice for competitive shooting where fast target acquisition matters. The top tang safety is easy to reach without shifting your grip. The tungsten grey receiver finish against the black barrel and stock gives the gun a two-tone look. The JM Pro designation comes from collaboration with competitive shooter Jerry Miculek, and the design reflects that influence in the controls and ergonomics. It handles well for competition use but works fine as a general-purpose field gun. ## Frequently Asked Questions **Q: What caliber is the 940 JM PRO?** A: The 940 JM PRO is chambered in 12 gauge with a 3" chamber. **Q: Who makes the 940 JM PRO?** A: The 940 JM PRO is made by Mossberg. **Q: What type of firearm is the 940 JM PRO?** A: It is a gas-operated semi-automatic shotgun with a 24" barrel, a steel receiver in a tungsten grey finish, and a black synthetic stock. **Q: What is the barrel length of the 940 JM PRO?** A: The barrel is 24 inches long. **Q: How many rounds does the 940 JM PRO hold?** A: It has a 4+1 capacity. **Q: What sights does the 940 JM PRO have?** A: It has HiViz Comp Sight fiber optic sights. **Q: Where can I buy the 940 JM PRO?** A: Compare current vendor offers on this page. ## What Reviewers Say *Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.* > Feel much of a difference between the bird shot and the buck shot and that was full power double up Buckshot and The Recoil is very similar to the low brass bird shot. > > — [1ShotTV](https://www.youtube.com/watch?v=qoKaU9vgGgQ&t=143s) > Boy that trigger can really go I did not expect it to go that fast and it kind of surprised me to be honest. > > — [1ShotTV](https://www.youtube.com/watch?v=qoKaU9vgGgQ&t=245s) > Like a Mossberg and I think Mossberg makes great shotguns especially for the money so it's no belli M4 but I would say this is probably the best semi-auto shotgun I have ever tried. > > — [1ShotTV](https://www.youtube.com/watch?v=qoKaU9vgGgQ&t=401s) > The price on these is what makes them so appealing I love it it ran perfectly and I would definitely recommend. > > — [1ShotTV](https://www.youtube.com/watch?v=qoKaU9vgGgQ&t=599s) ## What Customers Say *AI-generated insights from customer reviews* The Mossberg 940 JM Pro draws consistent praise for its cycling reliability. Owners report it runs smoothly through a variety of loads. The gas system is frequently credited for the reduced recoil compared to earlier Mossberg semi-autos, which makes extended range sessions more comfortable. The tungsten grey finish and overall build quality get positive mentions. Ergonomic features like the adjustable stock are well-regarded for fitting different shooters. Weight is the most common critique at 7.25 lbs. Some shooters find it heavier than they'd like for full days at the range or in the field. There are also occasional comments from shooters coming from other platforms about a learning curve with the controls, though most adapt quickly. ## Pricing **9 offers available** | Vendor | Price | |--------|-------| | Palmettostatearmory Com | $989.99 | | Grabagun Com | $999.99 | | Primaryarms Com | $999.99 | | Impactguns Com | $1008.09 | | Gritrsports Com | $1016.99 | | Shootingsurplus Com | $1017.97 | | Kygunco Com | $1031.67 | | Buds Gun Shop | $1049.49 | | Guns Com | $1058.99 | ## Similar Products - [Mossberg 940 JM Pro: Elite 12Ga Semi-Auto Shotgun - Black/Tungsten](https://gunsnation.com/p/mossberg-940-jm-pro-elite-12ga-semi-auto-shotgun-black-tungsten/UCHGDJ4k) - [Mossberg 940 Pro Turkey Shotgun - 12 Gauge, Greenleaf Camo Edition](https://gunsnation.com/p/mossberg-940-pro-turkey-shotgun-12-gauge-greenleaf-camo-edition/UCHGDJCP) - [Mossberg 940 JM Pro Semi-Auto Shotgun 12GA - Tungsten Gray](https://gunsnation.com/p/mossberg-940-jm-pro-semi-auto-shotgun-12ga-tungsten-gray/UCHGDJDV) - [Mossberg 940 Pro JM 12GA Semi-Auto Shotgun, Matte Blued Finish](https://gunsnation.com/p/mossberg-940-pro-jm-12ga-semi-auto-shotgun-matte-blued-finish/UCHGDJ9v) - [Mossberg 940 JM Pro: 12GA Semi-Auto Shotgun - Black MultiCam](https://gunsnation.com/p/mossberg-940-jm-pro-12ga-semi-auto-shotgun-black-multicam/UCHGDJ58) - [Mossberg 940 Pro: Ultimate 12 Gauge Semi-Auto Shotgun](https://gunsnation.com/p/mossberg-940-pro-ultimate-12-gauge-semi-auto-shotgun/UCHGDJCW) --- *Data from [GunsNation](https://gunsnation.com)*