Mossberg 940 JM Pro 12 Gauge Shotgun: The Ultimate Competitive Edge

For serious competitors and discerning shotgun enthusiasts, the Mossberg 940 JM Pro 12 Gauge (Model 85113, UPC: 015813851138) stands as a testament to peak performance, engineered from the ground up to dominate the demanding world of competitive shooting sports. Designed in collaboration with world-renowned shooter Jerry Miculek, this semi-automatic shotgun isn't just a firearm; it's a meticulously crafted instrument built for speed, reliability, and unparalleled control under pressure.

Whether you're asking, "What's the best shotgun for 3-Gun competition?" or "How can I shave precious seconds off my stage times?", the answer often points directly to the Mossberg 940 JM Pro. This shotgun solves the critical challenges faced by competitive shooters: the need for rapid follow-up shots, flawless cycling with diverse ammunition, quick and intuitive reloads, and the ability to withstand thousands of rounds without failure. It's purpose-built for those who demand a shotgun that keeps pace with their ambition, stage after intense stage.

Engineering for Endurance: Unrivaled Reliability and Smooth Operation

At the core of the Mossberg 940 JM Pro's reputation for excellence is its groundbreaking internal engineering. Competitive shooting is unforgiving, pushing equipment to its limits. Mossberg addressed this directly with several key advancements:

• Durable Gas System: The heart of any semi-automatic shotgun is its gas system, and the 940 JM Pro features a redesigned system built for incredible resilience. This innovative design allows for an astonishing up to 1500 rounds between cleanings. This isn't just a number; it translates directly into more time training and competing, and less time on the cleaning bench. For shooters running hundreds of rounds in a single match or practice session, this extended maintenance interval is a game-changer, ensuring consistent performance when it matters most.
• Nickel Boron-Coated Internal Parts: To complement the robust gas system, critical internal components, including the gas piston, magazine tube, hammer, and sears, are treated with a low-friction, high-durability nickel boron coating. This advanced finish dramatically reduces friction, leading to exceptionally smooth operation and enhanced corrosion resistance. The result is a shotgun that cycles effortlessly, even under adverse conditions, providing the consistent, reliable action competitive shooters depend on. This coating also contributes to the ease of cleaning when the time eventually comes, as fouling has less surface to adhere to.

This combination of a robust gas system and slick internal parts means fewer malfunctions, faster split times, and a shotgun that truly feels like an extension of the shooter.

Optimized for Speed: Ergonomics and Handling in Competition

Every element of the Mossberg 940 JM Pro's exterior is designed to enhance the shooter's interaction and optimize performance, especially during high-speed, dynamic movements characteristic of multi-gun competitions.

• Competition-Level Loading Port: One of the most critical aspects of competitive shotgunning is the speed and ease of reloading. The 940 JM Pro features an enlarged and beveled loading port, meticulously designed to facilitate rapid quad-loading or traditional two-round loading techniques. This generous opening minimizes the chance of fumbling rounds, allowing shooters to instinctively feed the magazine without breaking rhythm.
• Elevator and Follower: Complementing the optimized loading port are a redesigned elevator and high-visibility follower. The re-engineered elevator ensures snag-free, smooth feeding of shells into the chamber, while the bright, anodized follower provides immediate visual confirmation of the magazine's status, a small but crucial detail that aids in quick decision-making on the clock.
• Black MultiCam Adjustable Synthetic Stock: Fit is paramount for both comfort and recoil management. The 940 JM Pro boasts a high-quality synthetic stock in a distinctive Black MultiCam pattern, providing both durability and a tactical aesthetic. Crucially, this stock is fully adjustable for Length of Pull (LOP), Cast, and Drop.
  • Length of Pull (LOP): Adjustable from 13" to 14.25", allowing shooters of various builds and arm lengths to achieve an optimal fit. Correct LOP is essential for proper stance, swing, and managing felt recoil effectively.
  • Cast & Drop: The ability to adjust cast (horizontal deviation from the bore axis) and drop (vertical deviation) allows for precise customization, ensuring the shooter's eye aligns perfectly with the sights. This level of adjustability means the shotgun can be tailored to individual body mechanics, promoting natural point of aim and reducing the need for uncomfortable compensations during rapid target transitions.
• Streamlined Forend with Signature Texturing: The forend is not just streamlined for a sleek profile but also features Mossberg’s signature aggressive texturing. This provides a secure, non-slip grip even with wet hands or gloves, crucial for maintaining control during fast-paced movement and rapid firing sequences.
• HiViz TriComp Fiber Optic Sight: Quick and clear sight acquisition is vital. The 940 JM Pro is equipped with a HiViz TriComp fiber optic front sight. This highly visible sight gathers ambient light, creating a bright, unmistakable dot that draws the eye directly to the target. The TriComp design likely offers interchangeable elements, allowing shooters to choose the color and size best suited for their vision and lighting conditions, ensuring rapid target acquisition and precise shot placement.

Precision and Versatility: The Barrel and Choke System

The barrel and choke system are critical components that define a shotgun's accuracy and versatility across different shooting disciplines and target types.

• 24" Vent Rib Barrel: The 24-inch barrel offers an ideal balance for competitive shooting. It's long enough to provide excellent swing characteristics and promote consistent patterns, yet short enough to be maneuverable in tight spaces and during quick transitions between targets. The full-length vent rib dissipates heat efficiently, minimizing mirage during extended shooting sessions and providing a clean, unobstructed sight plane. Its matte blued finish ensures durability and reduces glare.
• Drilled & Tapped Receiver: The receiver is drilled and tapped, allowing for easy installation of aftermarket optics, such as red dot sights. This is a significant advantage for competitive shooters who often prefer the speed and precision of an optic, especially on distant targets or when shooting slugs. This feature enhances the shotgun's adaptability to various match formats and personal preferences.
• Briley Extended Chokes Included: The inclusion of Briley extended chokes underscores the 940 JM Pro's competitive pedigree. Briley is a renowned name in choke tubes, synonymous with precision and performance. Extended chokes are preferred in competition for several reasons:
  • Easy Changes: They extend beyond the muzzle, allowing for quick, tool-free changes during a match if different pattern densities are required for varying target distances.
  • Pattern Optimization: Briley chokes are known for their consistent and predictable patterns, helping shooters fine-tune their shot dispersion for everything from tight steel targets to distant clays.
  • The shotgun comes with a set of these crucial accessories, ready for competition right out of the box.

Built to Last: Durability and Aesthetics

Beyond its internal mechanics and ergonomic design, the Mossberg 940 JM Pro is constructed with robust materials and finishes to withstand the rigors of high-volume shooting and competition.

• Steel Receiver: The shotgun features a durable steel receiver with a matte blued finish, providing a solid foundation for the action and protecting against corrosion and wear.
• Overall Durability: From the high-quality synthetic stock to the nickel boron-coated internals and robust barrel, every component is chosen for its ability to deliver consistent performance over a long lifespan, representing a reliable investment for serious shooters.
• Weight and Balance: At 7.75 lbs, the shotgun offers a comfortable weight that helps absorb recoil while still being agile enough for dynamic movement. Its overall length of 44.75" provides excellent balance, contributing to natural pointing and smooth target transitions.

Why Choose the Mossberg 940 JM Pro for Your Next Competition?

The Mossberg 940 JM Pro isn't just another shotgun; it's a carefully considered tool for anyone looking to gain a competitive edge or simply own a high-performance semi-auto.

• For the 3-Gun Competitor: This shotgun is arguably one of the top choices available. Its lightning-fast cycling, generous loading port, capacity, and adjustability directly address the demands of rapid-fire, multi-target stages. The 1500-round cleaning interval minimizes downtime during intense match weekends.
• For the Serious Target Shooter: If you frequent sporting clays or trap ranges and seek a high-capacity, reliable semi-auto that can handle extensive practice sessions, the 940 JM Pro offers exceptional value and performance. Its adjustable stock ensures a perfect fit for comfort during long days at the range.
• For the Enthusiast Seeking Peak Performance: Even if competition isn't your primary goal, the engineering and features packed into the 940 JM Pro represent a significant leap in semi-automatic shotgun design. Its reliability, smooth operation, and customizable fit make it a pleasure to shoot.

In summary, the Mossberg 940 JM Pro delivers on its promise: a robust, reliable, and highly ergonomic shotgun built to compete and win. Its thoughtful design elements, from the durable gas system and nickel boron internals to the adjustable stock and competition-optimized loading, provide a distinct advantage. This is the shotgun for those who leave nothing to chance.

You can find the Mossberg 940 JM Pro 12 Gauge Shotgun (Model 85113) and a wide range of shooting accessories available at DEGuns.

Comprehensive Specifications for the Mossberg 940 JM Pro 12 Gauge Shotgun (UPC: 015813851138)

Feature	Specification	Details
Brand	Mossberg	Leading firearm manufacturer
Model	940 Pro	Competition-ready series
Gauge	12 Gauge	Versatile and powerful
Capacity	9+1	High capacity for competitive shooting
Chamber	3"	Accommodates standard and magnum shells
Action	Semi-Automatic	Gas-operated for reliable cycling
Barrel Length	24"	Optimal for balance and maneuverability
Barrel Finish	Matte Blued	Durable and non-reflective finish
Barrel Features	Vent Rib	Aids heat dissipation and sight picture
Sights	HiViz Fiber Optic	Bright, fast target acquisition
Choke System	Briley Extended	Included for pattern versatility
Receiver Material	Steel	Robust and durable
Receiver Finish	Matte Blued	Consistent with barrel for aesthetics
Stock Material	Synthetic	Durable and weather-resistant
Stock Finish	Black Multicam	Distinctive tactical pattern
Stock Adjustments	LOP, Cast, Drop	Customizable fit (13"-14.25" LOP)
Hand	Right Hand	Standard configuration
Overall Length	44.75"	Balanced and manageable
Weight	7.75 lbs	Good balance of stability and agility
Operating System	Gas	Efficient and reliable
Safety	Top Tang	Ambidextrous and intuitive
Application	Target Shooting	Optimized for competitive disciplines