Mossberg 940 JM Pro 12 Gauge Semi-Auto Shotgun, 24 in Barrel, 9+1 Capacity, Tungsten-Gray (MPN 85111)
This Mossberg 940 JM Pro pairs a 24-inch vent-rib barrel and 3-inch chamber with a competition-ready 9+1 capacity and a tungsten-gray finish. It features the redesigned 940 gas system rated for extended round counts between cleanings, nickel-boron–coated critical internals, oversized controls, and a receiver drilled and tapped for an optics rail. Built in the USA, this configuration includes an Improved Cylinder choke.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: There are handling marks from prior use. The front fiber-optic insert is missing. See photos for close-ups.
What’s Included
- Mossberg 940 JM Pro 12 Gauge semi-automatic shotgun (MPN 85111)
- Improved Cylinder choke tube (installed)
The 940 JM Pro platform centers on Mossberg’s updated gas system, designed to run for up to 1,500 rounds between cleanings. Critical internal components receive a nickel-boron coating to enhance lubricity and fouling resistance. The barrel is threaded for the Accu-Choke system, and this shotgun comes with an Improved Cylinder choke installed.
Capacity and handling are optimized for competition use. An extended magazine tube runs to near the muzzle for 9+1 rounds, while a competition-optimized loading port, elongated elevator, and orange follower support fast, consistent loading techniques.
Controls and ergonomics are set up for quick manipulation. Oversized controls—including the charging handle, bolt-release, tang safety, and trigger—provide positive purchase and high visibility. The black synthetic stock and forend include molded texturing, a thick ventilated recoil pad, and user-adjustable length of pull, drop, and cast. Length of pull is 14.5 inches.
The alloy receiver wears a tungsten-gray anodized finish and is drilled and tapped for mounting an optics rail. The 24-inch vent-rib barrel offers a clean sighting plane, and the chamber accepts both 2 3/4-inch and 3-inch 12-gauge shells.
This 940 JM Pro earned recognition across the industry, including the 2020 Caliber Award for Best New Shotgun and the 2021 NRA Golden Bullseye Award.