Mossberg 940 JM Pro 12 Gauge Semi-Auto, 24 in Barrel, 3 in Chamber, Extended 8+1, Black MultiCam, Accu-Choke Modified
This Mossberg 940 JM Pro is a competition-tuned 12 gauge autoloader co-developed with Jerry and Lena Miculek for 3-Gun. It features the updated 940 gas system with nickel-boron–coated internals for cleaner, longer-running operation, a 24 in vent-rib barrel threaded for Accu-Choke with an installed extended fluted Modified tube, and an extended 8+1 magazine. The receiver is hard-anodized matte black and marked 940 JM PRO, and the Black MultiCam synthetic stock provides an adjustable, textured grip with a recoil pad.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Not applicable - smoothbore barrel.
Specific Condition Notes: Minimal handling marks are visible on exterior surfaces. Please refer to the photos for close-up views.
What’s Included
- Mossberg 940 JM Pro 12 gauge semi-automatic shotgun
- Installed extended fluted Accu-Choke tube (Modified)
Purpose-built for speed, the 940 JM Pro includes an enlarged and beveled loading port designed to facilitate rapid quad-loading. An oversize charging handle and an oversized circular bolt-release pad further streamline manipulation under match conditions, while the top tang safety remains intuitive and familiar.
The 24 in vent-rib barrel is threaded for Accu-Choke and ships with an extended, fluted tube that carries a gold accent band; the barrel is marked for 12 gauge and accepts 2 3/4 in and 3 in shells. A green fiber-optic front bead provides a bright, precise aiming reference. The chamber is 3 in, aligning with the included Modified Accu-Choke for versatile performance.
The extended magazine tube offers an 8+1 capacity, and the synthetic stock in Black MultiCam camo includes texturing, adjustability, and a recoil pad. Length of pull measures 13.75 in for a compact, fast-handling feel on the clock.
The aluminum receiver wears a hard-anodized matte black finish, is drilled and tapped with plug screws, and is right-side marked 940 JM PRO. Made in the USA, this shotgun integrates competition-driven features throughout while retaining Mossberg’s familiar top tang safety and user-friendly controls.