ATA Arms S2 20 Gauge Semi-Auto Shotgun, 28″ Barrel, 5+1

Description

The ATA Arms S2 20 Gauge Semi-Auto Shotgun with a 28″ barrel and 5+1 capacity is a lightweight, inertia-driven scattergun built for upland hunters and clay shooters who want a reliable gas-free action. This 20-gauge model weighs just over 6 pounds, making it easy to carry all day, and the chrome-plated 7075-T6 aluminum receiver resists corrosion in wet brush. With a 3″ chamber and fiber optic front sight, it cycles target loads and magnum shells without adjustment. At $431.09, it delivers solid performance without the premium price tag.

Manufacturer	ATA Arms
Model	S2
Material	7075-T6 Aluminum receiver, steel barrel
Compatibility	20 gauge 2.75″ and 3″ shells
Finish	Chrome-plated receiver, blued barrel
Weight	Approx. 6.2 lbs (per manufacturer specs)
Condition	New

Key Features

• Inertia-Operated Action – Why it matters: No gas system to clean or adjust; the recoil spring cycles the bolt reliably across a wide range of loads from light target shells to heavy 3″ magnums.
• Chrome-Plated 7075-T6 Aluminum Receiver – Why it matters: This aircraft-grade alloy receiver is hard-anodized and chrome-plated to resist rust and wear, keeping the action smooth in humid hunting conditions.
• Fiber Optic Front Sight – Why it matters: The bright green fiber optic front bead gives you a fast, high-visibility reference for swinging on clay targets or flushing birds in low light.
• 28″ Barrel with 3″ Chamber – Why it matters: The 28″ barrel balances swing speed and sight radius for sporting clays, while the 3″ chamber lets you shoot steel or lead loads up to 1 3/8 oz.
• Wood Stock with Ventilated Rib – Why it matters: The walnut-finished hardwood stock provides a classic look and stable cheek weld, and the ventilated rib reduces mirage on hot days.

Who It’s For

This shotgun fits the budget-conscious upland hunter who walks miles for pheasants, quail, or grouse and wants a reliable semi-auto that won’t break the bank. It also works for casual clay shooters who shoot 100-200 rounds per month and want a gas-less action that runs clean. If you’re a left-handed shooter, note that the safety is reversible, but the bolt handle is right-side only.

Pros & Cons

Pros: Lightweight at 6.2 lbs, inertia action requires minimal maintenance, chrome receiver resists corrosion, fiber optic sight is fast to pick up, price under $450 is hard to beat for a 20-gauge semi-auto.

Cons: The wood stock finish is basic and can show scratches faster than synthetic; the inertia system sometimes struggles with light 1 oz target loads under 1200 fps.

Comparison

Feature	ATA Arms S2 20 Ga	Franchi Affinity 3 20 Ga	Stoeger M3020 20 Ga
Weight	6.2 lbs	6.4 lbs	5.9 lbs
Receiver Material	Chrome 7075-T6 aluminum	Anodized aluminum	Anodized aluminum
Barrel Length	28″	26″ or 28″	26″ or 28″
Capacity	5+1	4+1	4+1
Price	$431.09	~$899	~$529
Action	Inertia	Inertia	Inertia

The ATA S2 undercuts the Franchi Affinity 3 by nearly $470 while offering a longer barrel and higher capacity. Against the Stoeger M3020, the ATA has a chrome receiver and 5+1 capacity versus 4+1, though the Stoeger is slightly lighter. For the price, the ATA gives you the most capacity and corrosion resistance.

FAQ

Does the ATA Arms S2 cycle light target loads reliably?

It cycles 1 oz loads at 1200 fps and above reliably. With very light 7/8 oz loads under 1180 fps, you may get occasional short strokes during the first 50 rounds. After break-in, it smooths out.

Can I mount a red dot or scope on this shotgun?

The receiver is not drilled and tapped for optics. You can use a vent-rib mount that clamps onto the barrel, but it’s not ideal for heavy scopes. The fiber optic front sight works well for hunting and clays.

What chokes does the S2 come with?

It ships with three Beretta/Benelli-style Mobil choke tubes: full, modified, and improved cylinder. The barrel is threaded for standard 14mm x 1mm pitch chokes.

Is this shotgun suitable for left-handed shooters?

The cross-bolt safety is reversible for left-hand use, but the bolt handle and ejection port are on the right side. Lefties may get occasional gas blowback from the ejection port.

Ready to Order

The ATA Arms S2 20 Gauge Semi-Auto Shotgun gives you a 28″ barrel, 5+1 capacity, and an inertia action that runs clean for years. According to ATA Arms specs, the chrome-plated 7075-T6 receiver is built to withstand harsh field conditions. The 20-gauge semi-auto market has grown 12% in the last five years as hunters seek lighter guns for long walks. This S2 is a solid entry-level to mid-tier option that punches above its price point.

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

Browse more options in our Semi Auto Shotguns or 20 Gauge Shotguns. Need a case? Check our Shotgun Accessories.

Last updated: April 2026