Mossberg 940 JM Pro | 12 Gauge | 24″ | 85144

The Mossberg 940 JM Pro is a semi-automatic 12-gauge shotgun built with competition features and an optic-ready receiver cut for Shield RMSc-pattern micro dot sights. It ships with a 24-inch vent-rib barrel finished in matte blued steel, a tungsten-gray receiver, and an adjustable black synthetic stock with an adjustable length of pull. The design emphasizes rapid follow-up shots, streamlined handling, and a clean-running gas system with coated internal parts for increased durability and reduced maintenance.

Typical applications include competition shooting (3-Gun) and dedicated target shooting where repeatable ergonomics and fast sight acquisition are priorities.

Product Specifications

• The brand is Mossberg.
• The model is 940 JM Pro.
• The manufacturer part number is 85144.
• The UPC is 015813851442.
• The gauge is 12 Gauge.
• The action type is Semi-Auto.
• The maximum chamber size is 3".
• The barrel measures 24 inches.
• The barrel type is a vent rib.
• The barrel finish is Matte Blued.
• The receiver is finished in Tungsten Gray Anodized.
• The stock is black synthetic with an adjustable length of pull.
• The length of pull adjusts between 13"–14.25".
• The sights include a HiViz TriComp fiber-optic front sight and the receiver is optic-ready for Shield RMSc-pattern micro dots.
• The shotgun includes a Briley extended choke set.

This 940 JM Pro combines a competition-oriented control layout with corrosion-resistant internal coatings and a clean-running gas system to reduce maintenance intervals. The adjustable stock and optic-ready receiver make it suited to shooters who require fast sight acquisition and a tailored fit. Whether configured for matches or precise patterning on the range, the features here support consistent handling and repeatable results.

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