The Ultimate Guide to the Mossberg 940 JM Pro: A Competition Shotgun Redefined
In the world of competitive shooting, milliseconds determine the difference between victory and defeat. Mossberg, an industry giant in firearm innovation, has raised the bar with the Mossberg 940 JM Pro—a semi-automatic 12-gauge shotgun engineered for speed, reliability, and precision. Designed in collaboration with world-renowned shooter Jerry Miculek, this firearm is a powerhouse built for elite competition. Whether you’re a seasoned 3-gun shooter or an aspiring marksman, the 940 JM Pro offers a winning edge straight out of the box.
Why the Mossberg 940 JM Pro Stands Out
The Mossberg 940 JM Pro is not just another autoloading shotgun—it’s a competition-ready platform optimized for top-tier performance. Here’s why this firearm is making waves in the shooting sports community:
- Enhanced Gas System: Capable of running up to 1,500 rounds without cleaning, ensuring smooth cycling and reliability.
- Customizable Fit: Adjustable length-of-pull, drop, and cast provide a tailored shooting experience.
- Speed-Optimized Loading Port: Factory-machined for faster reloads, perfect for quad-loading techniques.
- Oversized Controls: Enlarged charging handle and bolt release allow for effortless operation in high-stress environments.
- Premium Sights & Chokes: HIVIZ CompSight fiber optic sight and Briley extended chokes for superior accuracy.
Mossberg 940 JM Pro: Technical Specifications
To provide a clear understanding of its technical prowess, here’s a breakdown of the Mossberg 940 JM Pro’s key specifications:
| Attribute | Details |
| Manufacturer | Mossberg |
| Item | B2_MOSS_85144 |
| Model | 940 Pro |
| Series | JM |
| UPC | 015813851442 |
| SKU | 85144 |
| Price | $1,159.33 |
| Pricing Unit | GN |
| Action | Semi-Auto |
| Action Type | SEMI-AUTO |
| Application | Target Shooting |
| Gauge | 12 Gauge |
| Capacity | 4 Rounds |
| Chamber | 3″ |
| Max Chamber Size | 3″ |
| Barrel Length | 24″ |
| Barrel Description | Vent Rib |
| Barrel Finish | Matte Blued |
| Barrel Length in Inches | 24 |
| Choke Configuration | Briley |
| Chokes Included | Extended |
| Hand | Right Hand |
| Internal Choke Tubes Y/N | Y |
| Checkering | Y |
| Stock Material | Synthetic |
| Stock Style | Field |
| Stock Finish | Black |
| Stock Finish Group | Black |
| Stock Color | BLACK |
| Size | Full Size |
| Monte Carlo | N |
| Receiver Description | Optics Cut |
| Receiver Finish | Tungsten Gray |
| Receiver Material | Steel |
| Recoil Pad | Y |
| Safety | Top Tang |
| Sights | HIVIZ CompSight Fiber Optic |
| Swivel Studs | YES |
| Overall Length (OAL) | 44.75″ |
| Overall Length in Inches | 44.75 |
| Length of Pull | 13″-14.25″ |
| Metal Color | Blued |
| Metal Finish | Matte |
| Similar Items | SGA12 |
| Weight | 7.25 lbs |
| Weight Range | 7 lbs to 7.99 lbs |
| Width | 9 |
| Length | 46.7 |
| Height | 3.5 |
| Total Package Weight | 10.2 |
Engineering Excellence: Key Features in Detail
1. Revolutionary Gas System
One of the standout upgrades in the 940 JM Pro is its self-cleaning gas system, allowing the shotgun to operate up to 1,500 rounds without maintenance. This ensures peak performance even under extreme conditions. Unlike older semi-auto models that require frequent cleaning, this system significantly reduces carbon buildup, providing a flawless cycling experience.
2. Competition-Ready Ergonomics
The adjustable stock and forend allow shooters to customize the length-of-pull, drop, and cast for an optimized fit. This is crucial for competitive shooters who demand consistency in grip, stance, and aiming.
3. Lightning-Fast Reloads
Mossberg has aggressively improved the loading port on the 940 JM Pro. The edges are machined and beveled straight from the factory, allowing competitors to efficiently quad-load shells without modifications. This feature alone saves precious seconds in competition scenarios.
4. Oversized Controls for Speed and Efficiency
- Large Charging Handle: Ensures quick and easy chambering, even with gloves on.
- Enlarged Bolt Release: Offers seamless operation under pressure.
- Extended Bolt Handle: Improves handling speed.
Comparison Chart: Mossberg 940 JM Pro vs. Competitors
| Feature | Mossberg 940 JM Pro | Beretta 1301 Comp | Benelli M2 |
| Gas System | Self-Cleaning, 1,500 Rounds | Standard Gas System | Inertia-Driven |
| Barrel Length | 24” | 21” | 24” |
| Capacity | 4+1 | 5+1 | 3+1 |
| Weight | 7.25 lbs | 7.1 lbs | 6.9 lbs |
| Sights | HIVIZ CompSight Fiber Optic | Ghost Ring | Red Fiber Optic |
The Role of Choke Tubes in Competition
Choke tubes are essential for optimizing shot pattern performance in competitive shooting. The Briley extended chokes provided with the 940 JM Pro allow shooters to fine-tune their spread for different stages and distances. A tighter choke provides better accuracy at long distances, while an open choke improves close-range target acquisition. Competitive shooters often carry multiple chokes to adapt to various course layouts, ensuring maximum control over shot dispersion.
How to Maintain Your Mossberg 940 JM Pro
Proper maintenance is crucial for ensuring long-term performance and reliability. After every competition or training session, shooters should:
- Disassemble the shotgun and inspect key components.
- Clean the gas system to remove carbon buildup.
- Lubricate the action to prevent wear and enhance cycling.
- Inspect and replace worn parts to maintain peak performance. By following these steps, the Mossberg 940 JM Pro will maintain its competitive edge and flawless operation.
The Impact of Jerry Miculek on the 940 JM Pro
Jerry Miculek, one of the most legendary competitive shooters in history, played a pivotal role in designing the Mossberg 940 JM Pro. His extensive experience in 3-Gun and speed shooting influenced key design choices such as:
- Faster reload access via an optimized loading port.
- Custom ergonomics for rapid handling.
- Enhanced durability to withstand high round counts. His expertise has ensured that the 940 JM Pro is competition-ready straight from the factory.
Mossberg’s Legacy in Competitive Shooting
Mossberg has long been a dominant name in competitive shooting sports, consistently innovating firearms tailored for professional and amateur competitors alike. Their legacy includes:
- Decades of reliable shotgun production.
- Collaborations with world-class shooters like Jerry Miculek.
- Continuous advancements in firearm technology to improve speed and precision. With the 940 JM Pro, Mossberg has once again proven its commitment to the competitive shooting community.
Final Thoughts: Is the Mossberg 940 JM Pro Worth It?
If you’re looking for a competition-grade shotgun that delivers elite performance without requiring aftermarket modifications, the Mossberg 940 JM Pro is an unbeatable choice. Designed with input from Jerry Miculek, this firearm redefines what a factory competition shotgun should be.
With its unmatched gas system, ergonomic enhancements, and speed-focused design, this autoloader is built to dominate.
🎯 Upgrade Your Arsenal – Buy the Mossberg 940 JM Pro! 🎯
Join the elite ranks of competitive shooters with the Mossberg 940 JM Pro—designed in collaboration with Jerry Miculek. Big Stone’s Armory has the best deals on this high-performance shotgun.
Please Note: Product pricing and availability may vary. Please verify current pricing and stock information from our website at https://www.bigstonesarmory.com.