Beretta A400 Xtreme Unico Camo Max-5 12 Gauge, 28 Inch Steelium Barrel, Optima-Bore HP, 3.5 Inch UNICO Chamber, Customized with Mag Tube Extension
The Beretta A400 Xtreme Unico Camo Max-5 stands out with its 3.5 inch UNICO chamber that accepts 2 3/4, 3, and 3 1/2 inch shells, a 28 inch Steelium barrel with Optima-Bore HP and OptimaChoke HP compatibility, and the Blink gas system with a rotating bolt. This example adds a magazine tube extension and barrel clamp, and retains the Kick-Off Mega recoil-reduction module in a full Realtree MAX-5 camo finish. A MOD choke is installed.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: This shotgun presents in great shape with minor, superficial scratches and blemishes. The bore is clean and shiny. The recoil pad is present.
What’s Included
- Chokes: HEVI-Shot chokes (ER and HR)
- Chokes: One flush-style choke tube (installed)
- Parts: Magazine tube extension with barrel clamp (installed)
The A400 platform here uses Beretta’s Blink gas system with a rotating bolt for fast cycling and reliable operation across a wide range of loads. The UNICO 3.5 inch chamber accepts 2 3/4, 3, and 3 1/2 inch shells, offering broad versatility for waterfowl, upland, or range use.
The 28 inch Steelium barrel is cold hammer forged and features Optima-Bore HP geometry, a vent rib, and compatibility with OptimaChoke HP tubes. It wears a ventilated rib with a red fiber-optic front bead for quick sight acquisition. A MOD choke is installed, and the bore diameter is 18.6 mm.
This shotgun is finished in Realtree MAX-5 camo on a synthetic stock and fore-end. The stock incorporates the Kick-Off Mega recoil-reduction module and overmolded grip panels, with a sling swivel stud and a 14.0 inch length of pull.
User-focused controls include a ribbed bolt handle, a right-side bolt-release button, a left-side triangular control button, and a cross-bolt safety. The configuration provides straightforward manipulation in the field.
This example is customized with a magazine tube extension and a barrel clamp. Capacity is listed at 5+1. The setup is compatible with OptimaChoke HP tubes, and HEVI-Shot chokes (ER and HR) are included.

