Orthos Arms Raider S4 Gry 12Ga 18

The Orthos Arms Raider S4 is a 12-gauge semi-automatic shotgun built for shooters who demand serious ergonomics and recoil management out of the box. This gas-operated platform comes chambered for 3-inch and 2¾-inch ammunition, with an 18.5-inch chrome-lined barrel and an 40-inch overall length (stock collapsed). It's equally at home on the range, in tactical training, or deployed for home defense—anywhere you need reliable, controllable firepower from a modern shotgun platform.

What sets the Raider S4 apart is the integration of purpose-built features you'd normally chase through aftermarket upgrades. The adjustable cheek pad and proprietary SHOCK FORCE recoil system are standard, letting you dial in comfort for extended shooting sessions and soften the blow of magnum loads. The FIBERTRON LED front sight—a fiber optic design with integrated LED illumination—pairs with a ghost ring rear sight for fast, intuitive target acquisition in variable light. An advanced oversized charging handle and enhanced bolt release keep manipulations smooth and efficient, even with gloved hands or under stress.

The receiver is T6 7075 hardened aluminum, the handguard is MLOK-compatible aluminum, and the stock accepts the included adjustable, recoil-mitigating assembly. A 3-piece modular vertical grip with integrated MLOK rail slots mounts where you need it. Safety is an oversized switch; the trigger is refined and responsive. At 9.5 pounds, it's manageable; with a combat sling included, you've got the foundation for carbine-style or tactical carry. Magazine capacity runs 6+1 (3-inch shells) or 7+1 (2¾-inch), and the included breacher choke tube gives you options for close-quarters work.

This isn't a stripped-down base model waiting for parts to arrive. Orthos Arms ships the Raider S4 with sling, sights, adjustable stock, and ergonomic furniture as standard—everything you need to start shooting confidently right out of the box.

Key Features

• Gas-operated semi-automatic 12-gauge with 18.5-inch barrel
• SHOCK FORCE recoil system reduces felt recoil and makes magnum shells manageable
• Adjustable cheek pad for custom fit and shooting comfort
• FIBERTRON LED fiber optic front sight with illumination for low-light target acquisition
• Ghost ring rear sight for speed and precision
• Advanced oversized charging handle and enhanced bolt release for reliable operation
• 3-piece modular vertical grip with MLOK rail—fully configurable
• T6 7075 hardened aluminum receiver and MLOK aluminum handguard
• Oversized safety switch and advanced trigger
• Top-mounted Picatinny rail for red-dot or magnified optics
• Sling mounts front and rear with combat sling included
• Available choke tubes (breacher included)

Specifications

Frequently Asked Questions

What ammunition does the Orthos Arms Raider S4 shoot?

The Raider S4 is chambered for both 3-inch and 2¾-inch shotgun ammunition. Magazine capacity is 6+1 (when loaded with 3-inch shells) or 7+1 (when loaded with 2¾-inch shells). The included breacher choke tube works with standard Benelli-pattern chokes.

What's included in the box?

Every Raider S4 ships with the shotgun, a combat sling, the adjustable stock assembly with SHOCK FORCE recoil system, the FIBERTRON LED front sight, a breacher choke tube, and an owners manual. You're ready to shoot out of the box—no additional purchases required to run the gun as configured.

How does the SHOCK FORCE recoil system work, and will it make magnum loads more comfortable?

The SHOCK FORCE recoil system is integrated into the adjustable stock and is designed to reduce felt recoil. According to Orthos Arms, it's engineered to make even 3-inch magnum shells more manageable to shoot, which is a significant benefit if you plan extended range sessions or tactical training with heavy ammunition.

Is the Raider S4 compatible with optics and modern accessories?

Yes. The Raider S4 features a top-mounted Picatinny rail for mounting red-dot sights, magnified optics, or other accessories. The handguard is MLOK-compatible, so you can mount tactical lights, vertical grips, or foregrips as needed. Sling mounts are standard front and rear.