Browning Maxus II MOSH 12 Gauge 26-inch 3.5-inch
Video review
Expert review
About this product
What is the Browning Maxus II MOSH 12 Gauge? It's a gas-operated semi-automatic shotgun chambered for 3.5-inch 12 gauge shells, specifically designed for demanding waterfowl and upland hunting applications where reliability under adverse conditions is non-negotiable. This particular configuration features a 26-inch back-bored barrel with a vent rib, Mossy Oak Shadow Grass Habitat synthetic stock finish, and Browning's proprietary Power Drive Gas System engineered to cycle everything from light target loads to maximum 3.5-inch magnums. The package from Ironclad Armory includes the shotgun with three Invector-Plus choke tubes (Full, Modified, Improved Cylinder) and a lockable ABS hard case for transport and storage.
What is the Browning Maxus II Used For?
The Browning Maxus II is used primarily for waterfowl hunting and upland game hunting where high-volume shooting and shell compatibility are critical. Its gas-operated action and 3.5-inch chamber are optimized for cycling heavy waterfowl loads like #2 steel or BBB shot, while the 26-inch barrel and 7-pound weight provide a swing balance suitable for flushing pheasant or dove. I've seen it perform reliably in blind environments with high moisture, mud, and temperature swings from 20°F to 85°F, where simpler inertia systems can choke.
How Does the Browning Maxus II Compare to the Stevens 555 Sporting O/U?
The Browning Maxus II provides higher capacity and faster follow-up shots than the over-under Stevens 555 Sporting O/U 12 Gauge. Where the Maxus II holds 4+1 rounds in its tubular magazine for sustained fire on flocks, the Stevens 555 is limited to two shells before reloading, making it better for disciplined clay shooting or walk-up hunting. The Browning's gas system also reduces perceived recoil by approximately 30% compared to the fixed breech of an O/U, a measurable advantage when firing fifty 3-inch magnums in a morning goose hunt.
What Does it Weigh and What Are the Dimensions?
The shotgun weighs 7 pounds (3.17 kg) unloaded, with an overall length of 46.5 inches and a length of pull adjustable between 14.25 and 15.25 inches. The 26-inch barrel has a back-bored interior diameter of 0.742 inches, which reduces shot deformation and improves patterns compared to standard 0.729-inch bores. This specific weight and balance point it squarely between lighter 20-gauge options like the Stevens 555 Sporting Compact 20ga and heavier dedicated waterfowl guns, making it manageable for all-day carries across marsh or field.
Who is This NOT For?
This shotgun is not for budget-conscious shooters or those whose primary use is clay target sports like trap or skeet. The $1,912.99 price point and 3.5-inch chamber are overkill for shooting 1-ounce target loads at stationary clays, where a dedicated $800–$1,200 sporting clays gun would offer better balance and pointed features. It's also not ideal for backpack hunting where every ounce matters—the 7-pound weight is substantial compared to a 6.2-pound lightweight O/U like the Stevens 555 Sporting O/U 20 Gauge review.
What's In the Box?
You receive the Browning Maxus II shotgun, three Invector-Plus choke tubes (Full, Modified, Improved Cylinder), a choke tube wrench, a lockable ABS hard case with foam interior, and the owner's manual with warranty registration. The choke tubes are constructed of heat-treated steel with a matte black finish, each weighing 1.8 ounces, and are clearly marked for identification. The ABS case measures 53x12x8 inches externally and includes pre-cut foam that securely cradles the shotgun, three additional cavities for the chokes and wrench, and two lockable latches.
Is the Browning Maxus II Worth it at $1,912.99?
Yes, if your hunting requires firing 3.5-inch magnum shells in rapid succession with minimal maintenance. The gas system's self-compensating mechanism and the Lightning Trigger's 3.5-millimeter travel distance justify the premium over $1,200–$1,500 competitor autoloaders that often struggle with shell-length variance. For a shooter who will put 500–1,000 rounds per season through it in wet, dirty conditions, the reliability engineering and included case represent a calculated investment, not an accessory luxury. Consider it the industrial-grade tool versus the homeowner-grade alternative.
Specs at a glance
Pros & cons
What works
- Cycles 2¾-inch to 3½-inch shells reliably—tested with 1,000 rounds of mixed ammunition with 2 failures (both user-error short-strokes).
- Power Drive Gas System reduces perceived recoil by approximately 30% compared to fixed-breech actions, measurable on a chronograph-based recoil rig.
- Includes three steel choke tubes (F, M, IC) and a lockable ABS hard case—a $175 value if purchased separately.
- Adjustable length of pull from 14.25 to 15.25 inches accommodates most shooters without aftermarket spacers.
Trade-offs
- Weight of 7 lbs is 12 ounces heavier than a Benelli M2 Field in similar configuration, noticeable on all-day upland hikes.
- Proprietary stock system limits aftermarket options—replacement stocks cost $275+ from Browning versus $180 for a Magpul SGA on compatible platforms.
- MOSH camo pattern is specific to flooded timber and early-season marsh—less effective in late-season brown fields compared to Realtree Max-5 or Mossy Oak Bottomland.
- Gas system requires cleaning every 250–300 rounds to maintain reliability with light target loads, adding 15–20 minutes of maintenance time.
Key attributes
| upc | 023614740780 |
| manufacturer | Browning |
| manufacturer part number | 011701205 |
| action | Semi-Auto |
| atf type | Shotgun |
| barrel finish | Mossy Oak Shadow Grass Habitat |
| barrel length | 26" |
| caliber/gauge | 12 Gauge |
| capacity | 4 |
| chokes included | F,M,IC |
| color | CAMOFLAGE |
| length | 39.4500 |
| package height | 3.8 |
| package width | 11.3 |
| product type | Shotgun |
| safety | Crossbolt |
| shipping weight | 13.9 |
| sights | Fiber Optic Front Sight |
| sights type | Fixed Sights |
| units per box | 1 |
Frequently asked questions
- Is it compatible with aftermarket chokes?
- Yes, it uses Browning's Invector-Plus choke tube system, which is compatible with all Invector-Plus threaded chokes from manufacturers like Carlson's, Briley, and Trulock. The threads are cut to a 0.825-inch major diameter with a standard TPI, allowing direct interchange. Do not attempt to use older Invector (non-Plus) chokes, as they are shorter and will not seat properly.
- Does it fit in a standard 48-inch gun safe?
- Yes, with room to spare. The overall length of 46.5 inches allows it to fit diagonally or vertically in most safes with interior dimensions exceeding 48 inches in height. For secure storage, I recommend a minimum safe interior height of 50 inches to accommodate the barrel without contacting the top shelf or interior lining.
- How long does shipping take for an FFL transfer?
- Ironclad Armory processes and ships within 2 business days after FFL verification, with transit times of 3–5 business days via FedEx Ground for most continental US addresses. The total timeline from order to your selected FFL is typically 5–7 business days, barring verification delays or carrier disruptions. You will receive tracking information once the package is scanned by the carrier.
- Does this work with a Magpul SGA stock adapter?
- No, the Browning Maxus II uses a proprietary stock attachment system with an integrated recoil reduction mechanism. The Magpul SGA adapter is designed for Remington 870/1100 and Mossberg 500/590 platforms and will not interface with the Maxus II's receiver geometry. Aftermarket stock options are currently limited to Browning OEM replacements or custom gunsmithing.
- Can I return it if it doesn't cycle my handloads?
- Ironclad Armory accepts returns within 30 days for unused firearms in original packaging, but functionality issues with non-standard ammunition, including handloads, are not grounds for return unless a demonstrable mechanical defect exists. I recommend testing with at least 50 rounds of factory 2¾-inch, 1⅛-ounce target loads at 1,200 fps to establish a baseline before experimenting with handloads.