Specna Arms SA-H01 ONE™ M4 Carbine Airsoft Rifle – Black

If you're looking for an airsoft rifle that’s as comfortable clearing corners in CQB as it is holding angles outdoors, the Specna Arms SA-H01 ONE™ is a serious contender. With its compact build, reinforced internals, and modular design, this M4-style electric rifle delivers the kind of flexibility, power, and handling that suits both new players and seasoned skirmishers alike.

Externally, the SA-H01 is constructed from a tough zinc-aluminium alloy with steel reinforcements in all critical spots—pins, screws, sling mounts. The polymer elements—like the stock pad and pistol grip—are designed for ergonomic comfort without sacrificing strength. The receiver and RIS handguard are anodised and powder-coated, offering excellent resistance against scratches and corrosion while maintaining a sleek, matte-black finish. It’s a rock-solid build that feels balanced and well put together in hand—something you’d typically expect from higher-end platforms.

Internally, this rifle shines with Specna Arms’ Enter & Convert™ quick spring change system. It allows you to switch springs in seconds (once the gearbox is out), giving you the ability to tune the FPS for different sites or game types without a full teardown. The included M120 spring delivers around 410 FPS out of the box—ideal for mid- to long-range use. Swap in the M90 spring included in the box, and you’ll be down to ~310 FPS, perfect for CQB environments or indoor events.

The reinforced V2 gearbox features a steel spring guide, 8mm ball bearings, steel gears on spacers, and four anti-reversal latches for reliable cycling. A rotary-style hop-up unit combined with a 240mm inner barrel ensures tight groupings and dependable range. And the steel breaker and type 2 cylinder complete a reliable, long-lasting internal setup that’s ready for plenty of hours in the field.

One of the most practical aspects of the SA-H01 is its layout. The 22mm RIS rail on top and quad-picatinny rail handguard let you mount lights, lasers, PEQ boxes, or grips exactly how you want. The included flip-up iron sights are easy to remove if you prefer an optic, and the hop-up is accessed via the charging handle, which also activates a working bolt catch—adding a great bit of realism when you're adjusting.

The foldable stock mounted on slides makes this rifle incredibly compact—ideal for CQB. This design does mean the battery is housed in a mock AN/PEQ box on the front rail, but this setup is balanced and keeps the rear profile clean and short for tight corners and fast transitions. The polymer grip is textured for non-slip control and comfort, and the fire controls—selector, mag release, trigger—are all classic M4 layout and metal-built for durability.

At 2850g and adjustable between 560mm to 685mm in length, this rifle is built for agility without compromising on realism or handling. It ships with a 300-round Hi-Cap magazine, offering reliable feeding and plenty of BBs to keep you in the game between reloads. The barrel features a 14mm CCW thread, making it compatible with suppressors and tracer units, allowing for easy cosmetic or functional customisation.

Whether you're heading into tight hallways or outdoor encounters, the SA-H01 ONE™ gives you the confidence, accuracy, and reliability needed for dynamic gameplay—all wrapped in a durable, compact, and highly customisable package.

Features

• Full metal receiver with steel-reinforced critical parts 
• Enter & Convert™ quick spring change system
• Compact folding stock on slides with AN/PEQ battery housing
• Rotary hop-up unit with 240mm inner barrel
• Reinforced V2 gearbox with 8mm bearings and steel gears
• Quad RIS handguard and top rail for accessories
• 14mm CCW threaded barrel with M4-style flash hider
• Working bolt-catch for hop-up access and realism

What you get

• Specna Arms SA-H01 ONE™ replica 
• 300-round Hi-Cap magazine
• Fixed iron sights
• Mock AN/PEQ battery box
• Additional M90 spring

Details

• Length: 560mm – 685mm (adjustable)
• Weight: 2850g
• Inner barrel length: 240mm
• Muzzle velocity: ~410 FPS (standard), ~310 FPS (with M90)
• Fire modes: Semi / Full-auto
• Gearbox: Modified V2 with reinforced internals
• Hop-Up: Adjustable rotary
• Material: Metal and polymer
• Thread type: 14mm CCW
• Battery: Not included (Mini Tamiya connector)