Specna arms SA-C03 CORE™ M4 AEG Rifle in Black

Specna Arms SA‑C03 CORE™ M4 AEG Rifle (Black)

The Specna Arms SA‑C03 CORE™ M4 AEG is one of those airsoft rifles that ticks a lot of boxes without rinsing your wallet. Part of Specna’s trusted CORE™ series, it’s made with the kind of practical upgrades and design touches that matter—especially if you’re just getting into the sport or want a dependable backup gun that can hold its own in a firefight.

Starting with the externals, this rifle balances durability and weight like a pro. The receiver, buffer tube, adjustable Navy-style stock, and pistol grip are all made from a tough nylon-reinforced polymer. It’s not just tough—it’s reinforced with fibreglass, giving it a surprising amount of strength while keeping things light and nimble. That means long days on your feet or CQB sprints won’t leave your arms screaming.

Metal parts include the outer barrel, enlarged charging handle, tactical sling points, and a bunch of reinforcement points—like screws, pins, and even the shell ejection port and mock bolt. Everything fits tight too—there’s no annoying rattle or flex between the upper and lower receivers. It’s got that satisfying solid build you usually only get on pricier airsoft AEGs.

One of the big wins here is the ESA™ (Easy Spring Access) system. Pop off the stock slide, and you’ve got quick access to the spring guide without tearing the gearbox apart. It’s a literal game-changer—adjust your power output in minutes without a bench full of tools. You get a factory-installed spring shooting around 380 FPS, plus a bonus M90 spring in the box that'll drop it to around 310 FPS. CQB legal? Check. Outdoor punch? Also check.

Internally, the SA‑C03 packs a metal V2 gearbox with 8 mm slide bearings and shimmed steel gears. The piston’s polycarbonate but features a full steel tooth rack for extra life. It runs a Type 1 cylinder, steel circuit-breaker, and pairs up with a rotary-style hop-up unit that meshes perfectly with the 6.03 mm precision inner barrel. Together, they give you proper consistency and accuracy—whether you’re picking targets off from distance or pushing up in tight quarters.

The top of the rifle has a rear flip-up sight and a fixed front iron sight—nice and functional straight out of the box. And that 14 mm CCW threaded outer barrel is ready for suppressors or tracer units, depending on your playstyle or site preferences.

It’s adjustable too—length goes from 800 mm to 880 mm with the stock extended, so you can set it up to fit your gear loadout or personal comfort. The Navy-style stock locks in firm and gives solid shoulder support, whether you’re running lightweight or fully loaded with mags and kit.

Out of the box, you get the rifle, a hi-cap mag, fixed iron sights, and the extra M90 spring. Just remember—it doesn’t come with a battery or charger, so check out the battery guide on-site to pair it with the right gear. But as far as airsoft AEGs go, this thing’s built for real action without the drama of endless upgrades or fiddly mods.

Highlights

• Nylon-reinforced polymer receiver with fibreglass for strength
• Full-metal barrel, sling mounts, charging handle, and internals
• ESA™ Quick Spring Change System
• Comes with both ~380 FPS and M90 (~310 FPS) springs
• 8 mm bearing metal V2 gearbox with steel gears
• 6.03 mm precision tight-bore inner barrel
• Adjustable Navy-style stock with 800–880 mm overall length
• 14 mm CCW threaded barrel for attachments

What's Included

• Specna Arms SA‑C03 CORE™ M4 AEG Rifle (Black)
• Hi-cap magazine
• Fixed front and flip-up rear iron sights
• Additional M90 spring

Technical Specifications

• Length: 800–880 mm (adjustable stock)
• Weight: 2.2 kg
• Colour: Black
• Material: Zinc and aluminium alloy, steel, nylon-reinforced polymer
• Muzzle Velocity: ~380 FPS / ~310 FPS with M90 spring
• Inner Barrel: 6.03 mm tight bore
• Gearbox: Full metal V2 with 8 mm bearings
• Thread: 14 mm CCW
• Battery Compatibility: LiPo/LiFe (not included)