Mossberg 940 JM Pro 12 Gauge Semi-Auto Shotgun 18.5" Barrel 6+1

The Mossberg 940 JM Pro delivers rapid-fire reliability for competitive shooting and tactical applications. This gas-operated semi-automatic shotgun cycles 2¾" and 3" shells without adjustment, maintaining consistent performance across different loads.

What Makes This Different

The 940 JM Pro features Mossberg's self-regulating gas system that automatically adjusts to different shell lengths and loads. Unlike traditional semi-autos that require manual adjustment or struggle with light loads, this system maintains reliable cycling from light target loads to heavy hunting rounds. The oversized controls and enlarged loading port facilitate faster reloads under pressure.

Key Features

• Self-regulating gas system cycles 2¾" and 3" shells automatically
• 18.5" barrel with cylinder bore choke optimized for close-range accuracy
• 6+1 capacity with 3" chamber capability
• Oversized bolt handle and safety for operation with gloves
• Enlarged loading port speeds tactical and competition reloads
• Picatinny rail accepts optics and accessories
• Synthetic stock and forend resist weather and impacts

Field testing demonstrates consistent cycling across various ammunition types, from 1⅛ oz target loads to 1¾ oz tactical rounds. The 18.5" barrel provides optimal balance between maneuverability and velocity retention. Competitive shooters report reliable function through extended shooting sessions, while the synthetic furniture maintains zero shift under temperature changes.

Technical Specs

• Gauge: 12 gauge, 3" chamber
• Barrel Length: 18.5" with cylinder bore
• Capacity: 6+1 rounds
• Overall Length: 38.5"
• Weight: Approximately 7.75 lbs
• Stock: Black synthetic with textured grip surfaces
• Action: Gas-operated semi-automatic
• Safety: Tang-mounted ambidextrous
• Sights: Bead front sight, Picatinny rail

The 940 JM Pro represents proven engineering focused on competitive and tactical requirements. Professional shooters choose this platform for its consistent performance and reduced maintenance needs compared to traditional gas systems.