Description
The Beretta A400 Xtreme Plus Marsh 30in is the long-barrelled gun in Beretta’s Optifade line, and Optifade Marsh is the odd one out among camouflage patterns: it is not a photograph of vegetation but a micro and macro pattern designed around how waterfowl actually see. Paired with 30 inches of Steelium Plus barrel, it is built for birds that circle wide and never quite commit.
Built around a 3.5-inch chamber and a 2+1 magazine, the Beretta A400 Xtreme Plus Marsh 30in carries Beretta part number J42XM10 and is a right gun with a vented rib and Kick-Off recoil reduction in the buttstock. The Blink gas system drives the action, and it cycles light target loads as readily as heavy magnums.
Where the Beretta A400 Xtreme Plus Marsh 30in belongs
- Gore Optifade Marsh across every external surface, including the barrel and vented rib
- 30-inch Steelium Plus barrel with an extended forcing cone for softer, more even patterns
- 3.5-inch chamber, with no adjustment needed to run lighter shells
- Kick-Off hydraulic dampers in the stock, which take the sting out of a long morning
- Blink gas operating system, built to keep cycling when the temperature drops
- Enlarged bolt handle, bolt release and safety that a gloved hand can still find

Why Optifade Marsh is not just another camo
- Designed around waterfowl vision rather than human vision, which reads colour differently
- Breaks the gun’s symmetry at distance instead of trying to copy one specific background
- Works across reeds, open water and stubble rather than being tied to a single habitat
- Applied over every external surface, so there is no bright receiver to give the gun away
- Paired here with the longest barrel Beretta offers on the platform
Specifications
- Manufacturer: Beretta USA
- Part number: J42XM10
- Gauge: 12
- Chamber: 3.5 inch
- Barrel length: 30 inches
- Barrel: Steelium Plus with vented rib
- Capacity: 2+1
- Stock: Gore Optifade Marsh synthetic with Kick-Off
- Finish: Gore Optifade Marsh, overall coverage
- Action: Blink gas-operated semi-automatic
- Hand: Right
- UPC: 082442893730
Loads, chokes and the 3.5-inch question
On the Beretta A400 Xtreme Plus Marsh 30in the 3.5-inch chamber is headroom rather than an obligation. Most hunting is done with 3-inch shells, and the longest loads earn their place on late-season birds at distance. Shotshell dimensions and pressure ceilings are published by SAAMI, and staying inside them is the cheapest insurance a gas gun can have.
For non-toxic shot, Apex Waterfowl TSS Blend carries more energy downrange than its pellet count suggests, while B&P Dual Bismuth is kinder to older chokes and suits decoying birds inside 35 yards.
Keeping it running in the cold
A gas gun proves itself in the last hour of a freezing morning. The self-cleaning piston on the Beretta A400 Xtreme Plus Marsh 30in pushes fouling forward instead of packing the gas cylinder, so the gun still cycles after three boxes of steel. Beretta’s Aqua Technology surface treatment stands up to salt spray and standing water better than a conventional finish, which matters on coastal hunts and in brackish marsh.
Maintenance is short. Wipe the exterior dry before the gun goes back in the case, run a patch through the bore, and clean the piston and gas cylinder every few hundred rounds. Leave the choke tube installed and lightly greased so the threads never seize.
Why this shotgun earns its place
- A 30-inch barrel carries a swing through a crossing bird instead of stalling on the trigger pull
- Gas operation and Kick-Off keep a day of 3.5-inch loads through the Beretta A400 Xtreme Plus Marsh 30in comfortable
- Steelium Plus bore geometry comes from Beretta’s competition guns, where long barrels are standard
- Optifade Marsh is a genuinely different approach to concealment, not a repackaged pattern
- Chokes, parts and factory service are easy to find across the United States
The Beretta A400 Xtreme Plus Marsh 30in is for pass-shooters and field goose hunters who want the longest barrel and a pattern that is not tied to one habitat. The same gun is offered at 28 inches and 26 inches; for flooded timber the 30-inch Bottomland hides better, and in open grass so does the 30-inch Shadow Grass.
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