SA-P03 Specna Arms PRIME M4 Carbine Airsoft AEG Electric Rifle w/ GATE Aster II (M4A1 Style)
A precision-built M4 carbine designed for serious airsoft players who want strong build quality and reliable performance. This rifle features a licensed Rock River Arms receiver with deep engravings and a durable nano coating, paired with a next-generation BLDC motor and GATE Aster II MOSFET for crisp trigger response and smooth operation. The ESA2 (Easy Spring Access) system allows rapid spring changes without tools for easy FPS tuning. With adjustable ergonomics and full rail coverage, this platform is adaptable for a wide range of play styles.
The PRIME Series specifically has a long list of upgrades compared to other AEGs on the market. Here is a list of the improvements that Specna Arms has made with the PRIME line-up:
- PRIME BLDC Brushless Motor
- Nano-coated body to prevent scratching
- 6.02mm tightbore inner barrel
- TDC Magnus Hop Chamber with Helium Flat Hop Bucking (the models we tested were able to lift .40g BBs!)
- GATE Aster II Mosfet with app-controlled programmable features like pre-cocking, active braking, adjustable trigger sensitivity, and different fire mode settings such as burst, binary, and semi only
- Reinforced gearbox can withstand M140 springs (~450 FPS)
- 16:1 CNC steel gears
- 8mm J-Cage bearings (Robust bushings on spur gear)
- Full metal rack piston
- Improved cylinder, cylinder head, piston head, and air nozzle
Additional Features
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Full metal receiver with Rock River Arms Licensing
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ESA quick spring change system allows the spring to be changed without the need to disassemble your gun
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2 different powered springs included in box, M135 (for 440-450 FPS), and an M90 (for 300-340 FPS)
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Classic KAC-style quad rail handguard
- 2 Included Mid-cap "S-mag" magazines
| Feature | Details |
|---|---|
| Manufacturer | Specna Arms / Rock River Arms Licensed |
| FPS | ~440 fps (includes M90 and M135 springs) |
| Overall Length | ~800 mm – 885 mm (adjustable) |
| Weight | ~2860 g |
| Inner Barrel | ~370 mm, 6.02 mm tight bore |
| Magazine Capacity | ~125 rounds |
| Fire Modes | Semi-Auto, Full-Auto, Safety |
| Gearbox | Version 2 "Aether" gearbox |
| Motor | Brushless BLDC motor |
| Threading | 14 mm Negative (CCW) |
| Battery / Power Source | 11.1v LiPo Recommended (not included) |
| Hop-Up | Adjustable, rotary |
| Package Includes | Rifle, 2x magazine, M90, spare M135 spring, cleaning rod, battery adapter, sticker sheet, manual |
Built for reliability and long-term performance, this M4 AEG combines modern electronics with a proven internal design. It is a solid choice for players who want realistic externals, responsive performance, and easy adjustability straight out of the box.
*Optic not included
*Product images provided by and authorized by Evike.com
