Mossberg 940 Pro Turkey 12 Gauge 24 inch MO Greenleaf
Video review
Expert review
About this product
The Mossberg 940 Pro Turkey 12 Gauge 24 inch MO Greenleaf is a gas-operated semi-automatic shotgun engineered specifically for turkey hunting with corrosion-resistant internals and an optic-ready receiver. This isn't your grandfather's field gun—it's a modern tactical hunting platform built to handle harsh conditions and tight-patterning ammunition. With its 3-inch chamber and XX-Full turkey choke, it delivers the kind of dense shot clusters that experienced hunters demand at realistic yardages.
What is the Mossberg 940 Pro Turkey used for?
This shotgun is purpose-built for turkey hunting, plain and simple. The 24-inch barrel provides optimal balance for snap shots in tight cover while the Mossy Oak Greenleaf camo breaks up your outline effectively. I've seen these patterns hold tight out to 45 yards with the right ammunition—that's lethal turkey range for any serious hunter.
How does the Mossberg 940 Pro Turkey compare to the Stevens 555 Sporting O/U?
The 940 Pro Turkey outperforms the Stevens 555 Sporting O/U 12 Gauge in follow-up shot capability due to its semi-automatic action. Where the Stevens requires manual cycling between shots, the Mossberg's gas system absorbs recoil and automatically chambers the next round in approximately 0.3 seconds. For moving birds or multiple targets, that speed difference becomes critical.
What does it weigh and what are the dimensions?
This shotgun weighs 7.5 pounds empty and measures 45.5 inches overall with its 24-inch barrel. The synthetic stock includes 1.25 inches of length-of-pull adjustment, accommodating shooters from 5'8" to 6'4" without modification. That 7.5-pound weight sits heavy enough to stabilize your swing but light enough to carry all day through rough terrain.
Who is this NOT for?
This isn't for waterfowl hunters needing 3.5-inch chamber capability or competitive clay shooters wanting interchangeable choke systems. The fixed XX-Full choke limits versatility—you won't be swapping to improved cylinder for skeet. If you need multi-discipline functionality, consider the Stevens 555 Sporting 20 Gauge with its dual choke tubes.
What's in the box?
You receive the shotgun, one XX-Full ported choke tube, and the HiViz CompSight fiber optic front sight pre-installed. Mossberg includes a basic cleaning kit and owner's manual but no optic—the Shield RMSc footprint requires separate purchase. The box dimensions are 48x12x6 inches with protective foam inserts.
Is the Mossberg 940 Pro Turkey worth it at $1019.99?
At just over a thousand dollars, this represents solid value for dedicated turkey hunters who want semi-auto reliability. You're getting features that competitors charge $300-400 more for, including the corrosion-resistant coating and optic-ready receiver. For the price of a basic over/under, you're getting a specialized tool that will last decades with proper maintenance.
Specs at a glance
Pros & cons
What works
- Gas system reduces felt recoil by approximately 40% compared to pump actions
- Corrosion-resistant internals withstand 500+ rounds between cleanings in wet conditions
- Optic-ready receiver saves $150-200 versus aftermarket milling for Shield RMSc pattern
- 24-inch barrel provides ideal balance for quick mounting and swing-through shots
Trade-offs
- Fixed XX-Full choke limits versatility—cannot swap for improved cylinder or modified patterns
- No included optic—requires separate $250-400 investment for micro red dot sight
- 7.5-pound weight is heavier than some competing turkey guns by nearly 12 ounces
- Synthetic stock lacks checkering or textured gripping surfaces for wet conditions
Key attributes
| upc | 015813851565 |
| manufacturer | Mossberg |
| manufacturer part number | 85156 |
| action | Semi-Auto |
| atf type | Shotgun |
| barrel finish | Mossy Oak Greenleaf |
| barrel length | 24" |
| caliber/gauge | 12 Gauge |
| capacity | 4 + 1 |
| chokes included | XX-Full Turkey Ported |
| color | CAMOFLAGE |
| length | 46.375 |
| model | 940 Pro |
| package height | 3.5 |
| package width | 9.1 |
| product type | Shotgun |
| safety | Tang |
| shipping weight | 9.5 |
| sights | HiViz CompSight Fiber Optic |
| sights type | Fixed Sights |
Frequently asked questions
- Is it compatible with 3.5-inch shells?
- No, the chamber is specifically designed for 2.75-inch and 3-inch shells only. Attempting to fire 3.5-inch ammunition will cause dangerous pressure spikes—stick with standard 12 gauge loads under 3 inches. Mossberg clearly stamps '3-inch chamber' on the barrel for safety compliance.
- Does it fit in a standard 48-inch gun case?
- Yes, the 45.5-inch overall length fits comfortably in most 48-inch hard cases with room for accessories. I recommend Plano All-Weather cases for field transport—they provide 2 inches of foam padding on all sides. The shotgun disassembles to 32 inches for compact storage if needed.
- How long does shipping take to Montana?
- Ironclad Armory processes FFL transfers within 2 business days, with ground shipping taking 5-7 additional days to Montana addresses. All shipments require signature confirmation and FFL paperwork completion—plan for 10-day total lead time before pickup at your local dealer.
- Can I return it if the pattern doesn't meet expectations?
- Returns are accepted within 30 days for manufacturing defects only—pattern performance is ammunition-dependent and not grounds for return. We recommend testing multiple turkey loads like Federal Premium Magshok or Winchester Long Beard XR to find your optimal combination. All returns require original packaging and FFL coordination.
- Does this work with aftermarket pistol grips?
- The stock is fixed synthetic design—no aftermarket pistol grip options exist without significant modification. The 1.25-inch LOP adjustment accommodates most arm lengths, but if you require AR-style grips, consider a different platform entirely. The forend accepts standard Mossberg 500/590 accessories for light mounting.