Caliber / Chamber: 12-gauge — accepts 2¾″ and 3″ shells.

Barrel length: commonly 20 in (50 cm) for AS-101S / many retail listings; IPSC variants offered with ~19.6″ or other lengths.

Action: Gas-operated, short-stroke; buffer/recoil-reducer options on some kits.

Magazine capacity (typical kits): 2+1, 5+1 and 10+1 (some bundles show 9+1 or other mags depending on market).

Weight: ≈ 3.4–3.6 kg (varies with config/accessories).

Materials: 7075 T6 aluminum upper & lower; 4140 steel barrel; polymer furniture.

Chokes / Muzzle: interchangeable choke set usually included; IPSC/tactical versions may also include compensator options.

Pros: modular (AR-style controls, adjustable stock), magazine-fed for fast reloads, available competition variant, decent build materials for the price.

Considerations: heavier than some shotguns once accessorised; gas system needs periodic maintenance and may need tuning with different loads; spare mags/parts availability and local legal classification vary by country.