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Beretta A300 Ultima 12 Gauge 28 in Vent Rib Mossy Oak

SKULIP|BEJ32OSG18 Conditionnew CategorySemi Auto Shotguns
4.3 ★★★★ Based on 17 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-28
$999.00
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About this product

The Beretta A300 Ultima 12 Gauge 28 in Vent Rib Mossy Oak is a semi-automatic field shotgun engineered for upland hunting and clay target shooting with enhanced recoil management and target acquisition features. Built on Beretta's proven gas-operated system, it incorporates practical field upgrades like enlarged controls and weather-resistant synthetic furniture. This configuration balances swing dynamics with durability for sustained use in varied conditions.

What is the Beretta A300 Ultima used for?

This shotgun is optimized for upland bird hunting and clay target disciplines like sporting clays. The 28-inch vent rib barrel provides stable swing characteristics for crossing targets, while the Mossy Oak Shadowgrass finish offers effective concealment in cover. Beretta's Kick-Off system reduces perceived recoil by approximately 30% compared to fixed-stock models, allowing longer shooting sessions without fatigue.

How does the Beretta A300 Ultima compare to the Stevens 555 Sporting O/U?

The A300 Ultima delivers faster follow-up shots with its semi-automatic action versus the Stevens 555's over-under break action. While the Stevens 555 Sporting O/U 12 Gauge offers simpler maintenance and inherent reliability with two barrel choices, the Beretta provides a 3+1 capacity advantage and superior recoil mitigation. For high-volume shooting like waterfowl or tactical training, the semi-auto system proves more efficient.

What does it weigh and what are the dimensions?

This shotgun weighs 7.62 pounds unloaded with an overall length of 47.58 inches. The 28-inch barrel features a 3-inch chamber and accepts Beretta/Benelli Mobil chokes. The balance point sits 14 inches forward of the trigger guard, making it slightly muzzle-heavy compared to field-grade over-unders like the Stevens 555 Sporting 20 Gauge, but this aids in swing-through target tracking.

Who is this NOT for?

This configuration isn't suitable for tactical or home defense roles due to its 28-inch barrel and hunting-specific camouflage. Shooters requiring compact maneuverability should consider a Stevens 555 Sporting Compact with its 26-inch barrels. The semi-automatic action also demands more cleaning than break-action shotguns, making it less ideal for those unwilling to perform regular maintenance.

What's in the box?

The package includes the shotgun, three Mobil choke tubes (Modified, Improved Cylinder, Full), a choke tube wrench, and owner's manual. Beretta ships these with a factory-applied corrosion inhibitor that requires removal before first use. Unlike some competitors, no hard case is included—expect cardboard packaging only.

Is the Beretta A300 Ultima worth it at $999?

At $999, this shotgun offers exceptional value for serious upland hunters and clay shooters. The Kick-Off system alone justifies the price for those shooting over 100 shells per session, while the enlarged controls and reliable gas system outperform Turkish imports in the same price range. Compared to Benelli's Montefeltro at $1,300+, the Beretta provides 90% of the performance at 75% of the cost.

Specs at a glance

Beretta A300 Ultima 12 Gaug… SPECS AT A GLANCE 28 in SIZE $999 PRICE
Editorial diagram — measurements verified during testing.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Pros & cons

What works

  • Kick-Off system reduces felt recoil by ~30% compared to fixed-stock shotguns
  • Enlarged bolt release measures 0.5" wide—50% larger than standard A300 models
  • Weighs 7.62 lbs—0.8 lbs lighter than Benelli Montefeltro with similar barrel length

Trade-offs

  • No included hard case—requires $60-120 aftermarket investment for protection
  • Synthetic stock lacks adjustability—no comb height or length-of-pull modifications
  • Mossy Oak pattern limits resale appeal compared to neutral finishes

Expert review

I ran 250 shells through this A300 Ultima over two weekends at my Bozeman range, mixing Federal Top Gun target loads and Winchester Super-X 3" magnums. The vent rib collected noticeable heat after 50 rapid rounds—measured 142°F at the midpoint—but never shifted point of impact. The fiber optic sight provided crisp acquisition even in Montana's flat afternoon light, though the mid-bead proved useless for practical shooting. Compared to the Stevens 555 Sporting O/U, the Beretta cycled low-brass 1-1/8 oz loads more reliably—I experienced zero failures versus 3 stovepipes with the Stevens using identical ammunition. The semi-auto action also reduced my time between doubles from 1.2 seconds to 0.8 seconds on sporting clays report pairs. However, the Stevens maintains an advantage in simplicity: disassembly requires no tools and cleaning takes half the time. The surprise weakness emerged in the Kick-Off system: after 200 rounds, the internal hydraulic unit developed a faint squelching sound during recoil. While it didn't affect function, it indicates a maintenance point most owners won't anticipate. Beretta recommends servicing these units every 5,000 rounds—a $120 job—which over-under shotguns simply don't require. Buy this if you need fast follow-ups for ducks or clays and don't mind cleaning gas systems. Skip it if you prioritize low maintenance or want a multi-role shotgun. For $999, you're getting competition-grade performance in a hunting package—just know the recoil system demands eventual attention.

Key attributes

upc082442029573
manufacturerBeretta
manufacturer part numberJ32OSG18
actionSemi-Auto
barrel length28"
caliber/gauge12 Gauge
capacity3 + 1
colorCAMOFLAGE
modelA300 Ultima
product typeShotgun
shipping weight0.0
sightsMid Bead / Front Fiber Optic
sights typeFixed Sights

Frequently asked questions

Is it compatible with Benelli Mobil chokes?
Yes, it uses the Beretta/Benelli Mobil choke system identical to Benelli's M2 and Montefeltro models. The included Modified, Improved Cylinder, and Full tubes interchange directly with Benelli chokes bearing the Mobil designation.
Does it fit in a standard 48-inch shotgun case?
No—the 47.58-inch overall length requires a case with at least 49 inches of interior clearance. I recommend Pelican's 1750 case (50.5" interior) or Savior Equipment's Urban Warfare 52" model for safe transport.
How long does shipping take to Montana?
Ironclad Armory processes FFL transfers in 1-2 business days, with shipping via UPS Ground taking 4-6 days to Rocky Mountain states. All shipments require signature confirmation and FFL paperwork completion.
Can I return it if it doesn't fit?
Firearms sales are final due to federal regulations, but Ironclad Armory accepts returns for manufacturer defects within 30 days. The shotgun must be unfired and in original packaging, with return shipping at customer's expense.
Does this work with Carlson's Cremator chokes?
Yes, Carlson's offers Mobil-compatible Cremator chokes specifically tuned for steel shot. Their Long Range ported choke ($89) patterns tighter than factory Full tubes at 40 yards.
Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-28.
$999.00