Mossberg 940 JM Pro 12 Gauge Semi-Automatic Shotgun with Tungsten Gray Anodized Receiver

  • Item Number: 85111
  • /
  • View More Items by Mossberg
  • /
  • Condition: NEW
Mossberg 940 JM Pro 12 Gauge Semi-Automatic Shotgun with Tungsten Gray Anodized Receiver
$839.99

Temporarily Out of Stock

Includes FREE shipping
  • CITADEL BOSS-25 12 GAUGE AR-STYLE SEMI-AUTOMATIC SHOTGUN

    Citadel Boss-25 12 Gauge AR-Style Semi-Automatic Shotgun
    $309.99

  • MOSSBERG 940 PRO TACTICAL 12 GAUGE 18.5 IN BARREL

    Mossberg 940 Pro Tactical SPX 12 Gauge Shotgun with 18.5 Inch Barrel
    $929.99

  • GFORCE ARMS GF-12AR 12 GA 18.5` 5+1 OD GREEN

    GForce GF-12AR 12-Gauge Semi-Auto Shotgun with OD Green Finish
    $249.99

  • MILITARY ARMAMENT CORPORATION MAC 2 TACTICAL 12GA INERTIA 3` WOOD STOCK AND FOREARMS 18.5` BARREL

    Military Armament Corporation MAC 2 Tactical 12-Gauge Semi-Auto Shotgun with Wood Stock
    $419.99

  • MILITARY ARMAMENT CORPORATION MAC 1014 MARINE 12GA 18.5` BARREL NICKEL FINISH

    Military Armament Corporation MAC 1014 Marine 12 Gauge Semi-Auto Shotgun with Electroless Marine Nickel Finish
    $429.99

  • MILITARY ARMAMENT CORPORATION MAC 2 TACTICAL MARINE WOOD 12 GAUGE SHOTGUN

    Military Armament Corporation MAC 2 Tactical Marine Wood 12 Gauge Shotgun
    $429.99 $419.99

  • GFORCE ARMS GF12AR 12 GA 18.5 5+1 FDE MC

    GForce GF-12AR Semi-Automatic 12 Gauge Shotgun with FDE Cerakote Finish
    $249.99

  • CHIAPPA HONCHO 12GA TACTICAL PUMP 14` MATTE BLACK

    Chiappa Honcho 12 Gauge Pump-Action
    $349.99

  • MOSSBERG 590 SHOCKWAVE 12GA WITH 14 IN BARREL

    Mossberg 590 Shockwave 12 Gauge Pump-Action with 14 inch Barrel
    $469.99

  • WINCHESTER FIREARMS SXP DEFENDER 12GA BLACK 18 IN BBL

    Winchester SXP Defender 12 Gauge Pump Shotgun with Black Finish
    $266.66

  • GFORCE ARMS GF12AR AR-12 12 GAUGE SEMI-AUTO SHOTGUN

    GForce AR-12 12 Gauge Semi-Automatic Shotgun
    $219.99

  • MOSSBERG MAVERICK 88 CRUISER 12 GAUGE PUMP

    Mossberg Maverick 88 Cruiser 12 Gauge Pump Shotgun
    $290.00 $259.99

  • Federal 12 Gauge 2 3/4 1 oz Power Shok Rifled Slug Police Trade Ammo 5/Box

    Federal 12 Gauge 2 3/4 1 oz Power Shok Rifled Slug Police Trade Ammo 5/Box
    $3.99
    ($0.80 / round)

  • Fiocchi 12 Gauge 2-3/4 in 9 Pellet Defense Dynamics 25/Box

    Fiocchi 12 Gauge 2-3/4 in 9 Pellet Defense Dynamics 25/Box
    $10.99
    ($0.44 / round)

  • Federal 12 Gauge 2-3/4 in 438 gr HP Rifled Slug Hydra-Shok Police Trade-In Ammo 5/Box

    Federal 12 Gauge 2-3/4 in 438 gr HP Rifled Slug Hydra-Shok Police Trade-In Ammo 5/Box
    $4.99
    ($1.00 / round)

  • Federal 12 Gauge 2-3/4 in 9-Pellet 00 Buckshot Police Trade-In Ammo 5/Box

    Federal 12 Gauge 2-3/4 in 9-Pellet 00 Buckshot Police Trade-In Ammo 5/Box
    $4.99
    ($1.00 / round)

  • Remington 12 Ga 2 3/4 in 1 1/8 oz. 7.5 Shot Shotshell Gun Club Target Loads 25/Box

    Remington 12 Ga 2 3/4 in 1 1/8 oz. 7.5 Shot Shotshell Gun Club Target Loads 25/Box
    $13.99
    ($0.56 / round)

  • Aguila 12 Gauge 1-3/4 7/8 oz Minishell Led Slugs 25/Box

    Aguila 12 Gauge 1-3/4 7/8 oz Minishell Led Slugs 25/Box
    $19.99
    ($0.80 / round)

  • Federal 12 Ga Top Gun Target 2 3/4 Size 7.5 25/Box

    Federal 12 Ga Top Gun Target 2 3/4 Size 7.5 25/Box
    $8.99
    ($0.36 / round)

  • Winchester 12 Gauge 2.75 in 9 Pellet 00 Buck Ranger Police Trade Ammunition 5/Box

    Winchester 12 Gauge 2.75 in 9 Pellet 00 Buck Ranger Police Trade Ammunition 5/Box
    $3.99
    ($0.80 / round)

  • Hornady 12 Ga 2 3/4 Inch 300 gr FTX Custom Lite Slug 5/Box

    Hornady 12 Ga 2 3/4 Inch 300 gr FTX Custom Lite Slug 5/Box
    $13.99
    ($2.80 / round)

  • Hornady 12 Gauge 2 3/4 in 1 oz Rifled Slug American Gunner 5/Box

    Hornady 12 Gauge 2 3/4 in 1 oz Rifled Slug American Gunner 5/Box
    $8.99
    ($1.80 / round)

  • Federal 12 Gauge 2 3/4 00 Buck Shot Power Shok Police Trade Ammo 5/Box

    Federal 12 Gauge 2 3/4 00 Buck Shot Power Shok Police Trade Ammo 5/Box
    $3.99
    ($0.80 / round)

  • Rio 12 Gauge 2.75in 9 Pellets 1 Buckshot Royal Buck 25/Box

    Rio 12 Gauge 2.75in 9 Pellets 1 Buckshot Royal Buck 25/Box
    $10.99
    ($0.44 / round)

Product Description

What’s in the Box

  • 940 JM Pro 12 Gauge Semi-Automatic Shotgun with Tungsten Gray Anodized Receiver
  • Cable Lock
  • Owner’s Manual

The result of two years of development alongside world champion shooters, Jerry and Lena Miculek, the 940 JM Pro is designed to meet the needs of today’s competition shooter with the incorporation of an array of aftermarket modifications and accessories direct from the factory.

Using the iconic 930™ JM Pro-Series Competition Shotgun as a baseline, the Miculeks worked with Mossberg engineers to identify and help re-design major areas of improvement that included the gas system; loading port; point-of-aim/point-of-impact; overall product fit and functionality; sight system; and choke system.

All the newly designed components led the way for the introduction of a new autoloading platform from Mossberg, the 940. Major attributes of the 940 autoloading shotgun include:

  • Gas System: The new gas system on the 940 will run up to 1,500 rounds before cleaning and will reliably cycle any type of quality factory-made 2 ¾ or 3-inch ammunition. A stepped and vented-spacer component has also been incorporated that keeps the gas system running fast by shedding any moisture or carbon build-up every time it cycles.
  • Loading Port: The 940’s loading port has been designed to allow the user to efficiently quad-load the magazine tube straight out of the box without any need of modification to the receiver. The elevator and shell catch have also been designed to eliminate common pinch-points.
  • Point-of-Aim / Point-of-Impact: Mossberg engineers worked to design a new barrel-making process for the 940 that ensures the consistent production of a platform that will allow a user to maintain an accurate point-of-aim/point-of-impact when utilizing quality factory-made ammunition.
  • Fit and Functionality: The 940 sports a slim profile and ergonomic forend and stock, both feature Mossberg’s signature texturing that offers a positive, yet comfortable grip. The stock is completely userconfigurable, offering out-of-the box adjustability for length-of-pull (13 – 14.25 inches), drop, and cast. The receiver is anodized for durability and the controls (charging handle and bolt release button) are oversized. Internal components are nickel boron-coated for smooth, reliable functionality.
  • Sight System: The 940 JM Pro utilizes a fiber optic HIVIZ® TriComp sight system that offers nine userinterchangeable LitePipes, in three colors and three shapes of varied height, for superior sighting in any competitive environment.
  • Choke System: Equipped with Mossberg’s Accu-Choke™ system, the 940 JM Pro ships with a set of Briley® extended chokes (Cylinder, Improved Cylinder and Modified) that come engraved with constriction for easy selection.

Firearm Specifications

  • Brand: Mossberg
  • Model: 940 JM Pro
  • Gauge: 12 Gauge
  • Overall Length: 44.75"
  • Barrel Length: 24 Inch
  • Capacity: 9+1 Round
  • Chamber Size: 3 Inch
  • Weight: 7.75 lbs
  • Stock: Black Synthetic
  • Barrel Finish: Matte Blued
  • Sights: Front Fiber Optic
  • Chokes: Briley Extended Set
  • Length of Pull: 13-14.5 Inch
  • Length of Pull Type: Adjustable

Customer Comments & Questions

Customer Reviews

(5 out of 5) Gun Barrel
by Gary from Mentor, OH on June 25, 2021

Had to send the gun barrel in for replacement. Had a little bit of a Hassel but Mossberg came out on top. The word Mossberg that stamped into the barrel well the letter M was a little over stamped and dented the barrel. So with the turn around time I had to take a brand new gun apart and send the barrel in and got a new replacement about 3 weeks lost not having the gun. That was less time tha the over a year trying the find one. Outdoor Superstore came through 3 times for offering me the 940. The first two times I was late in viewing my email and the last time I jumped and bought two one for me and one for my son. Now have to find ammo to shoot them....lolololol

(5 out of 5) What A Machine
by David from Palmer, TX on September 11, 2021

This shotgun is extremely smooth and insanely accurate`;` old Jerry & Mossberg knocked it out the park with this one! It’s worth every penny and if your lucky enough to find one don’t wait make the purchase or you’ll regret it. This will be your favorite 3-Gun competition shotgun.

(5 out of 5) ED
by Ed B. from Whitehouse, TX on December 30, 2025

I have a collection of shotguns back to the Belgian made A5 to new Benellis. This 940 Pro has become one of my favorites. The gas system allows rapid fire with no hesitation, like the Remington 1100 did. Thank you.