Mossberg 940 JM

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Mossberg 940 JM Gun Stats

Mossberg 940 JM

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These 940 JM Pro autoloaders were built to compete and win. Inside, you will find a new durable gas system that allows for up to 1500 rounds between cleaning, nickel boron-coated internal parts for smooth operation, and a competition-level loading port, elevator, and follower. Outside, an adjustable stock and streamlined forend sport Mossberg signature texturing, while a host of stylized, functional components combine for competition— to optimize speed, accuracy, and durability.

Mossberg 940 JM For Sale

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Mossberg 940 JM Specs

1 Brand

2 Category

Technical Data

Barrel Length



8 + 1




124 oz

Mossberg 940 JM Features

The Mossberg 940 JM Pro is a semi-automatic 12-gauge shotgun with an 8 or 9 round capacity depending on the length of the shells used.  Its 24-inch vent-rib barrel is cut with a 3 inch chamber and uses chokes that can be replaced without the aid of special tools.

Mossberg 940 JM Ballistics

Mossberg 940 JM Capacity

The 12-Gauge Mossberg 940 JM Pro has a 3 inch chamber and has a fixed magazine tube capable of holding 9 rounds of 2-¾ inch shells or 8 rounds of 3 inch shells.  Rounds are loaded directly into the magazine tube through the loading port in the bottom of the receiver.

The 940 JM Pro has an unloaded weight of 7.75 pounds and measures 44.75 inches long.  These attributes allow it to excel in 3-Gun style shooting competitions which is its most popular application.

Mossberg 940 JM Mobility


Mossberg 940 JM Ergonomics

The 940 JM Pro maintains the overall profile of classic semi-automatic shotguns with its half-pistol-gripped stock and smooth handguard.  Both pieces feature checkering to allow for more control while still remaining comfortable to hold.  The charging handle and bolt release are enlarged to provide more surface area and increase the user’s control.

Mossberg 940 JM Fit & Finish

The Mossberg 940 JM Pro is built with blued steel components and is available with black furniture, titaniam-nitride coated controls and a tungsten colored receiver or with all-black controls and a dark Multicam camouflage pattern on the stock.
Fit and Finish

How much is a Mossberg 940 JM worth?

In 2024 a new or used Mossberg 940 JM value varies depending on supply and demand. In the last 12 months there is great demand for a Mossberg 940 JM and most shotguns. The Price for a Mossberg 940 JM has increased in cost by $0.00 in 2024 compared to 2023.

Estimated New and Used Values for a Mossberg 940 JM Values are based on a basic model with no options or colors.

Condition Trade-In Private Party Dealer
New In box $538.84 $704.64 $828.99
Excellent $497.39 $663.19 $746.09
Very Good $455.94 $663.19 $746.09
Good $414.50 $621.74 $704.64
Fair $290.15 $538.84 $663.19
Poor $207.25 $414.50 N/A

Gun Value Conditions explained:

New in box - 100% condition in unopened box. Excellent - 95%+ condition with or without box.

Very Good - 90% - 95% condition (all parts/finish should be original).

Good - 80-90% condition (all parts/finish should be original).

Fair - 30% - 80% condition, parts, and finish may or may not be original. Must function properly and shoot.

Poor - under 30% condition. Firearm has severe wear and tear, does not function, or is damaged.

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