Retay MOB: Advanced 12 Ga Semi Auto with Inertia Plus Action

The modern shotgun needs to be versatile: quiet and composed for a morning hunt, durable and repeatable for a long season, and ergonomic enough to keep follow-up shots on target. Hunters and tactical shooters who demand consistency will find a compelling option in a design that blends proven mechanics with practical field features.

RETAY USA ACE TYPE R [MOB] is built on Retay’s patented Inertia Plus repeating action, and it brings a host of thoughtful features to the 12-gauge semi-auto category.

Key features and how they perform in the field

The core of this shotgun’s performance is the Inertia Plus repeating action. This system resists being bumped out of battery and allows deliberate, quiet bolt closing — a critical advantage during hunting when you don’t want to alert nearby game. The Type R variant adds a humpback receiver that extends the sight plane, helping the eye naturally pick up the front bead for faster target acquisition.

Ergonomics are emphasized with a rubberized stock and cheek rest that tame recoil and make shooting heavier 12-gauge loads more comfortable. Textured surfaces on the forend and grip improve control in wet or cold conditions. A single fiber optic front bead keeps the sight picture clean while offering excellent visibility in low-light mornings and wooded setups.

Chambered in 12 gauge with a 28-inch barrel and a 3-inch chamber, RETAY USA ACE TYPE R [MOB] covers most hunting and field applications you’ll encounter. The Mossy Oak Bottomland camouflage pattern reduces visual signature across a range of cover types, and the included shim kit allows shooters to fine-tune the length of pull for a better, more repeatable cheek weld.

Shop this product and view the design details that set this model apart for serious field use.

Inertia Plus action — practical advantages

Inertia-driven actions are known for simplicity and reliability, but Retay’s Inertia Plus adds targeted improvements for real-world use. By reducing the chance of the bolt closing prematurely if bumped, the system enhances safety and dependability in dynamic environments. The quiet bolt closing feature is particularly useful to hunters setting up blinds or stalking birds — minimize mechanical noise and let your skill do the rest.

Durability and maintenance

Less complex gas systems mean fewer parts exposed to fouling from heavy loads and environmental debris. The Inertia Plus design follows that trend, offering a straightforward breakdown for routine maintenance and a robust interface between bolt and receiver. For shooters who value uptime in the field, the simplified maintenance profile is a meaningful benefit.

Ergonomics, handling, and recoil management

The rubberized stock and cheek rest are not cosmetic choices — they actively improve comfort when running full-power 12-gauge shells or when putting together rapid follow-up shots. The textured grip surfaces give confidence in wet weather or when wearing gloves. The included shim kit lets you adjust length of pull so young shooters or those wearing heavy outerwear can maintain a consistent, repeatable mount.

Sighting and target acquisition

The Type R’s humpback receiver extends the sight plane, reducing the time it takes to align with the fiber optic front bead. For upland work or clays, that extended plane translates into faster middling-to-long-range sighting and more reliable strike-to-target transitions. The single, high-visibility bead is low-profile enough to avoid cluttering the sight picture while still being bright when you need it.

Applications: hunting and field use

As a 12-gauge with a 28-inch barrel and 3-inch chamber, RETAY USA ACE TYPE R [MOB] is built for traditional field roles: waterfowl, upland bird hunting, and general-purpose shotgun use. The Mossy Oak Bottomland camo makes it especially suited to wooded and marshland environments where blending into cover matters. The soft cheek pad and rubberized butt mitigate muzzle rise when shooting heavier magnum rounds, making follow-ups faster and more comfortable.

For someone who travels between blinds, fields, and stands, the combination of steadiness, quick sight pickup, and a forgiving stock profile makes the ACE TYPE R a practical choice for the season. Price is competitive at $1,079, reflecting the specialized action and integrated field-oriented features included with the platform. View product details and pricing to compare specs and decide if it fits your kit.

What to expect in real use

Expect a shotgun that prioritizes stealth and ergonomic control. The quiet bolt operation and secure inertia design make this model a strong candidate for early-season hunts when sound discipline matters. The rubberized contact points and adjustable LOP via the shim kit help ensure that repeatable mounting and recoil management are part of the package, from the first shot to the last flush drive of the day.

Final thoughts from the blind and the range

RETAY USA ACE TYPE R [MOB] is a thoughtful mix of hunting-focused features and dependable inertia-driven mechanics. If you want a 12-gauge that emphasizes quiet operation, fast sight acquisition, and comfort under recoil — and you appreciate the utility of a 28-inch barrel with a 3-inch chamber — this model deserves a hands-on look. The Mossy Oak Bottomland finish and included shim kit add practical value for serious field shooters.

Check availability and move from research to range time: Check current availability.

— John Wick & Garand Thumb

People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.