Specna Arms SA-A90 ONE™ M4 AEG Airsoft Rifle – Black

The Specna Arms SA-A90 ONE™ is a true heavyweight in every sense—robust, powerful, and built to thrive in any airsoft scenario. Whether you’re laying down fire in outdoor skirmishes or adapting for tight CQB environments, this airsoft rifle gives you the flexibility and performance needed to stay on top of your game. With full metal construction, upgraded internals, and a classic M16-style stock, it blends realism with battle-readiness straight out of the box.

This isn’t your average M4. The SA-A90 is crafted from a tough zinc and aluminium alloy, reinforced with steel components in all high-stress points—like the sling mounts, screws, and body pins. The entire receiver is sandblasted, anodised, and powder-coated for excellent resistance to corrosion and wear. The result? A sleek matte black finish that doesn’t just look professional—it stands up to scrapes, bangs, and weather like a champ.

One of the standout features of this airsoft gun is the SAEC™ (Specna Arms Easy Change) Quick Spring Change System. With this, swapping your main spring is fast and tool-free. So whether you're pushing the 430 FPS mark for outdoor games or swapping to the included M90 spring to get down to ~310 FPS for CQB, it only takes moments. No need for a tech or a gearbox teardown—just mission-ready flexibility.

Internally, the SA-A90 means business. It houses a reinforced Version 2 gearbox with 8mm bearings, steel gears, a type 2 cylinder, and a polycarbonate piston with steel teeth—serious components that ensure durability and smooth cycling. The tight-sealing metal nozzle, metal hop-up unit, and a 390mm inner barrel give you range and consistency, especially when paired with high-quality BBs and a dialled-in hop-up.

Externally, the SA-A90 walks the line between traditional and tactical. You get a modular KeyMod handguard for modern attachment options—grips, lights, lasers—while the long 22mm RIS top rail handles optics with ease. Flip-up iron sights are included and removable, so you can run irons or your favourite red dot or scope. The fixed M16-style stock isn’t just for aesthetics—it offers loads of battery space, especially for larger-capacity LiPo or LiFe cells, keeping you in the fight longer without constant battery swaps.

The rifle also includes an operational bolt catch mechanism for added realism—always a nice touch in the immersion department. On the performance side, the 14mm CCW threaded barrel gives you instant access to suppressors or tracer units. A 300-round steel high-capacity magazine is included for those who prefer to carry more ammo and spend less time reloading.

Despite weighing in at a hefty 4.6kg, the SA-A90 is well balanced and surprisingly manoeuvrable. The weight lends realism and helps with stability during aimed shots, especially when going prone or using a bipod. The ergonomic pistol grip and well-designed fire selector make handling intuitive even under pressure.

For players who want a tough, field-ready electric rifle with a serious performance edge and room to adapt, the SA-A90 is a beast that delivers on all fronts. You won’t need to upgrade out of the box, but if you want to, it’s more than ready.

Features

• Full metal construction with steel reinforcements 
• SAEC™ Quick Spring Change System for tool-less FPS adjustment
• Reinforced V2 gearbox with upgraded internals
• Modular KeyMod handguard with RIS rail
• Fixed M16-style stock with large battery space
• 430 FPS out of the box; includes M90 spring for CQB
• Flip-up detachable iron sights and 14mm CCW threaded barrel
• Operational bolt-catch for added realism

What you get

• Specna Arms SA-A90 ONE™ airsoft rifle 
• 300-round steel high-capacity magazine
• Flip-up iron sights
• Additional M90 spring
• Cleaning rod

Details

• Length: 905mm
• Weight: 4600g
• Inner barrel length: 390mm
• Fire modes: Semi / Full-auto
• Muzzle velocity: ~430 FPS (stock); ~310 FPS (with M90)
• Gearbox: Reinforced V2 with 8mm bearings
• Hop-Up: Adjustable
• Material: Zinc and aluminium alloy, steel reinforcements, polymer stock and grip
• Connector type: Battery powered (not included)