Beretta A400 KO 12 Gauge Semi-Auto Shotgun, 30″ Barrel
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$1,649.00Original price was: $1,649.00.$1,549.00Current price is: $1,549.00.
🚚 Ships to your local FFL — order online, put your FFL dealer’s name and address in the Order notes box at checkout, and we coordinate the rest. Most firearms ship same or next business day. How buying a gun online works.
Beretta A400 KO is a 12 gauge semi-auto shotgun with a 30" Steelium barrel, a 3" chamber and a Mossy Oak Original Shadow Grass finish. It is for field hunters who want a gas-operated camo shotgun with a long barrel and interchangeable chokes.
12 gauge semi-auto with a 3" chamber
30" Steelium barrel
3+1 round capacity
Optima HP EXT chokes: Cyl, Mod, Full
Mossy Oak Original Shadow Grass finish
52" overall length
SKU: DAV-J40SLOSG10 · Mfr part #: J40SLOSG10 · UPC: 082442072166
The Beretta A400 KO is a 12 gauge semi-auto shotgun with a 30″ Steelium barrel. It has a 3″ chamber and holds 3+1 rounds. The finish is Mossy Oak Original Shadow Grass, and the sight is a fiber optic bead. Overall length is 52″.
What sets the A400 KO apart
This shotgun runs on the B-Link Pro gas system. The stock is the Kick-Off Plus, and the grip has a redesigned texture. A B-Lok magazine cap holds the magazine tube in place. The receiver is drilled and tapped, so you have a starting point if you want to add a mount. Chokes are the Optima HP EXT style, in Cylinder, Modified and Full, so you can change patterns to suit the shot.
The long 30″ barrel and camo pattern point to field use. It suits hunters who work grass, marsh edges and open cover and want a semi-auto that handles 3″ shells. A fiber optic bead gives a clear front reference when you mount the gun and swing.
For gear, think about what the day calls for. A sling helps on long walks. A shell pouch or belt carrier keeps ammunition within reach. A padded case protects the finish in the truck. If you plan to mount an optic, pick a base made for a drilled and tapped receiver and check the fit before you head out.
Beretta A400 KO 12 Gauge Semi-Auto Shotgun, 30" Barrel Specifications
Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
Q: Does the Beretta A400 KO shoot 3-inch shells?
A: Yes. It has a 3" chamber, so it is built to chamber 3" 12 gauge shells.
Q: Is the Beretta A400 KO gas operated?
A: Yes. It is a semi-auto that uses the B-Link Pro gas operating system.
Q: Is the A400 KO drilled and tapped?
A: Yes. The receiver is drilled and tapped for adding a mount.
Q: How many rounds does the A400 KO hold?
A: 3+1 rounds. That is three in the magazine and one in the chamber.
Q: What chokes does this A400 KO use?
A: It uses Optima HP EXT chokes in Cylinder, Modified and Full.
Warranty and Manufacturer
Covered by the Beretta factory warranty; warranty terms come from Beretta.
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