Beretta A400 Xplor Action KO 12 Gauge, 28-Inch Steelium, Bronze Anodized Receiver, OptimaBore HP
The Beretta A400 Xplor Action KO is a 12-gauge, gas-operated semi-automatic with Beretta's Kick-Off recoil-reduction system and a 28-inch Steelium barrel. It features OptimaBore HP over-bored geometry (18.6 mm) with a vent rib and a red fiber-optic front bead. The bronze-anodized aluminum receiver, Italian CIP proof marks with CN date code, and Made in Italy markings set this example apart. It includes OptimaChoke HP tubes and accessories; a Patternmaster Long Range tube (Model 5420, Beretta/Benelli Mobil pattern) is also included but is not compatible with this OptimaChoke HP barrel.
This A400 Xplor Action KO uses a rotating bolt and offers a 3-inch chamber for 2 3/4- and 3-inch shells with a 4+1 capacity. The walnut stock and forend include fine checkering, a rear sling swivel stud, and a MicroCore recoil pad. Choke options noted include Full, Cylinder, and Modified, and the barrel is marked OB HP for the OptimaBore High Performance system.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: The gun is in great shape overall, with a few minor scratches and small blemishes from light handling. There is noticeable finish blemishing around the ejection port.
What’s Included
- Beretta factory hard case (green)
- Beretta OptimaChoke HP flush tubes: Cylinder (OK-STEEL-CL) and Full (NO-STEEL-F)
- Patternmaster Long Range choke tube, Beretta/Benelli fit (Model 5420) — Beretta/Benelli Mobil pattern; not compatible with this OptimaChoke HP barrel
- Beretta OptimaChoke HP wrench (blue)
- Magazine plug
- Beretta A400 manual
- Beretta stock spacer/shim for Kick-Off stock
- Beretta gun oil bottle
- Original factory box/packaging
The 28-inch Steelium barrel is over-bored to 18.6 mm and uses the OptimaBore HP profile to manage shot patterns efficiently. The vent rib paired with a red fiber-optic front bead provides a clear sight picture, and the barrel is marked OB HP to confirm the system.
The bronze-anodized aluminum receiver shows Beretta's sculpted design language while keeping weight down. Italian CIP proof marks, the CN date code, and "BERETTA – GARDONE V.T. – MADE IN ITALY" markings are present, underscoring its Italian manufacture and proofed status.
The KO (Kick-Off) stock integrates Beretta's recoil-reduction system with a MicroCore recoil pad, and the checkered walnut furniture offers secure handling. A rear sling swivel stud is installed for field carry. The cross-bolt safety is positioned at the trigger guard.
The gas-operated action with a rotating bolt is paired with a cartridge drop/magazine cut-off control for convenient loading management. The 3-inch chamber accepts both 2 3/4- and 3-inch shells, and the gun is configured for 4+1 capacity. Choke options noted include F, CL, and M, and this example includes two OptimaChoke HP flush tubes (CL, F). An additional Patternmaster Long Range tube (Model 5420, Beretta/Benelli Mobil pattern) is included but is not compatible with this OptimaChoke HP barrel.