Description
The Beretta A400 Xtreme Plus Left Hand is not a right-hand gun with the safety swapped. Beretta builds a mirrored receiver for it: the ejection port sits on the left side, the bolt handle is on the left, and the stock is cast to put a left-handed shooter’s eye over the rib without craning. Empties throw away from the face instead of across it, which is the whole point.
Built around a 3.5-inch chamber and a 2+1 magazine, the Beretta A400 Xtreme Plus Left Hand carries Beretta part number J42XL18L and is a left 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 Left Hand belongs
- Mossy Oak Original Bottomland across every external surface, including the barrel and vented rib
- 28-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

What a true left-hand receiver changes
- Ejection port on the left side, so hulls clear away from a left-handed shooter’s cheek
- Bolt handle and bolt release reached by the right hand without breaking the firing grip
- Stock cast toward the left shoulder, so the rib lines up without tilting the head
- No hot gas or brass crossing the sight picture on a follow-up shot
- Same 28-inch Steelium Plus barrel and 3.5-inch chamber as the right-hand gun
Specifications
- Manufacturer: Beretta USA
- Part number: J42XL18L
- Gauge: 12
- Chamber: 3.5 inch
- Barrel length: 28 inches
- Barrel: Steelium Plus with vented rib
- Capacity: 2+1
- Stock: Mossy Oak Original Bottomland synthetic with Kick-Off
- Finish: Mossy Oak Original Bottomland, overall coverage
- Action: Blink gas-operated semi-automatic
- Hand: Left
- UPC: 082442027661
Loads, chokes and the 3.5-inch question
On the Beretta A400 Xtreme Plus Left Hand 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 Left Hand 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 genuine left-hand action, not a converted right-hand gun with a reversed safety
- Full-coverage Mossy Oak Original Bottomland leaves no blued steel to rust in a wet blind
- Gas operation and Kick-Off keep a day of 3.5-inch loads through the Beretta A400 Xtreme Plus Left Hand comfortable
- Left-hand shotguns are built in small numbers, so a configuration this specific is worth grabbing
- Standard Beretta chokes, parts and service apply to the Beretta A400 Xtreme Plus Left Hand exactly as they do to the right-hand model
This gun is for the left-handed waterfowler who has spent years shooting a right-hand autoloader and putting up with brass past the nose. If you shoot right-handed, the 28-inch Bottomland and the Shadow Grass version cover the same ground, and the 26-inch Bottomland is quicker in tight cover.
All firearm purchases ship to a licensed dealer and require a completed background check. Contact MAG5 Firearms if you need help arranging the transfer.






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