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Mossberg

Mossberg 940 Pro Field 12 Gauge Semi Auto Shotgun

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

12 Gauge

A 3" chamber for 2-3/4"

28" Vent

A fiber optic front sight

Synthetic Stock

A matte black finish

4-round Capacity

For field use

Length Pull

Adjusts from 13" to 14.25"

$799.99
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SKU: 85155-015813851558

Overview

Built for hunters who want a practical semi-auto for field use, this 12-gauge model combines a 28-inch vent rib barrel with a fiber optic front sight to support quick target acquisition in changing light. Its 3-inch chamber accepts both 2-3/4" and 3" shotshells, giving it flexibility for a range of hunting and clay shooting applications. The synthetic stock and forend, along with the matte finish, are suited to hard use in the elements without adding unnecessary complexity. At 7.75 pounds with an adjustable length of pull from 13" to 14.25", it offers a balanced setup that can be tailored for a more comfortable fit in the field.

Why Hunters Choose the Mossberg

3-inch Chamber

Accepts both 2-3/4" and 3"

Synthetic Stock

Matte black finish

Vent Rib

Barrel includes a fiber optic

Adjustable Length

Of pull from 13" to

4-round Capacity

Suits field use

Key Features

  • 12 gauge semi-auto shotgun with a 3" chamber for 2-3/4" and 3" shotshells.
  • 28" vent rib barrel with a fiber optic front sight for clear aiming reference.
  • Synthetic stock and forend with a matte black finish.
  • 4-round capacity for field use.
  • Length of pull adjusts from 13" to 14.25".
  • 7.75 lb weight and 47.5" overall length for manageable handling.

Best Used For

  • Hunters wanting a 12 gauge semi-auto for field use with a 3-inch chamber
  • Shooters who prefer a synthetic-stock shotgun for wet or rough conditions
  • Users needing a fiber optic front sight for clearer aiming in changing light
  • Hunters and clay shooters looking for a 28-inch barrel and 4-round capacity
  • Those wanting adjustable length of pull for a more tailored fit

Specifications

ActionSemi Auto
Barrel Length28"
Barrel TypeVent Rib
Blade FinishMatte Blue
Capacity4 Rounds
Chamber3"
Forend MaterialSynthetic
Front SightFiber Optic
Gauge12
Length Of Pull Adjustment13" to 14.25"
Overall Length47.5 in
Shotshell Compatibility2-3/4" and 3"
Stock MaterialSynthetic
Weight124 oz

Pros

  • 3-inch chamber accepts both 2-3/4" and 3" shotshells
  • Synthetic stock and forend with matte black finish
  • Vent rib barrel includes a fiber optic front sight
  • Adjustable length of pull from 13" to 14.25"
  • 4-round capacity suits field use
  • 7.75-pound weight supports easier handling and maneuvering

Considerations & Trade-offs

  • The 3" chamber allows use of both 2-3/4" and 3" shotshells, but it does not extend to larger magnum options beyond that chambering.
  • At 7.75 lbs., it offers a manageable carry weight, though it is still a full-size 12 gauge field shotgun rather than a lightweight upland option.
  • The synthetic stock and forend are built for field use, but they prioritize durability and weather resistance over traditional wood aesthetics.
  • With a 4-round capacity, it is set up for hunting and field use rather than higher-volume shooting applications.

Suggested Comparisons

  • Waterfowl shotguns
  • Upland hunting shotguns
  • Clay target shotguns
  • Semi-automatic shotguns

Suggested Accessories

  • Shotgun case
  • Choke tubes
  • Cleaning kit
  • Shooting glasses

Frequently Asked Questions

What shell sizes will the Mossberg 940 Pro Field chamber accept?

It has a 3" chamber and accepts both 2-3/4" and 3" shotshells.

Is the stock adjustable on this shotgun?

Yes. The listed length of pull adjustment is 13" to 14.25".

What are the key field-ready features listed for this model?

The product data lists a synthetic stock and forend, a matte black finish, a vent rib barrel, and a fiber optic front sight.

How many rounds does it hold?

The listed capacity is 4 rounds.

What are the listed size and weight details?

The product lists a 28" barrel, 47.5" overall length, and a weight of 7.75 lbs.