KPYK SA-PJ15 PRIME Aster II ETU BLDC airsoft rifle

The Specna Arms x KPYK SA-PJ15 PRIME™ Aster II ETU BLDC™ airsoft Carbine is the culmination of a high-profile collaboration between Specna Arms and KPYK, combining rugged all-metal construction with precision engineering to deliver field-ready performance. The body features Nano Coating to resist scratches, while a predominantly steel build on critical components ensures durability under hard use. For accessory versatility, the rifle features M-LOK mounts and a Picatinny rail, enabling quick attachment of red dot sights, lasers, vertical grips, torches, and more. For a broader selection of gear, browse our airsoft rifles collection

Key Features

• Collaboration between Specna Arms and KPYK delivering a unique platform with a strong, durable metal framework and a polymer pistol grip, adjustable stock, and mid-cap magazine.
• Fully featured with M-LOK mounting slots and a side 1U020 CRC gas tube overlay handguard for accessory customization.
• Nano Coating on the body to prevent scratching and extend finish life during intense field use.
• 8mm J-Cage ball bearings and 8mm plain bearings in the gearbox for smooth, reliable operation.
• Steel cylinder and CNC steel gears with a 16.1:1 ratio for robust power transfer and consistent performance.
• Rotating TDC Magnus Hop-Up chamber and Helium Flat Hop eraser for highly stable ball cushioning and precision.
• Discharge device on a 24mm CW thread for compatible muzzle devices.
• Space under the breech cover for a stick-type battery, facilitating compact, balanced setup on the field.
• Enter & Convert™ quick spring change system for rapid Tuning of power and compression to suit different environments.
• Gate ASTER II electronic system with Bluetooth 5.2 for replica telemetry, settings, and enhanced features on smart devices and watches.

Technical Highlights

The SA-PJ15 PRIME™ Aster II ETU BLDC™ is engineered for serious airsoft players who demand reliability in CQB, milsim, and field scenarios. The included Specna Arms DarkMatter™ High Speed 27-35K brushless motor delivers aggressive trigger response and sustained fire, while the GATE ASTER II control system provides active braking (0–100%), pre-cocking (0–5) and de-cocking to extend spring and gear life. This system supports both brush and brushless motors and offers sniper mode, low battery warnings, and efficient battery consumption for extended games.

What’s Inside the Replica

• Inside the replica you will find 8mm J-Cage bearings in the motor and piston pinion, plus 8mm plain bearings for the center pinion.
• Steel cylinder, precision 6.02mm inner barrel, and CNC steel gears with a 16.1:1 ratio.
• Reinforced piston with steel jaw and rotating TDC Magnus Hop-Up chamber for precise elevation adjustments.
• Specna Arms DarkMatter High Speed motor paired with the Gate Aster II for dependable, high-performance control.
• Aluminium head and nozzle, and a complete set of two extra springs (M90 and M135) for field tuning.
• Powerful, yet efficient, the system is designed to maximize consistency across engagement distances and field layouts.

Real-World Benefits

On airsoft fields, this carbine shines with its sturdy build, modular rail system, and reliable ETU-driven performance. The long-range accuracy from a precision 6.02mm inner barrel and Magnus Hop-Up ensures tight groupings at mid to long distances, while the compact, adjustable stock and polymer furniture provide comfort during extended skirmishes. For players who value customization, the combination of M-LOK slots and a Picatinny rail enables a tailored setup for CQB or outdoor environments, backed by a robust gearbox and a feature-rich electronic control system.

Specifications

Build material	All-metal body with polymer furniture
Inner barrel	6.02 mm precision
Gearbox	8 mm bearings in motor/pinion, 8 mm plain bearing in center pinion, CNC steel gears 16.1:1
Hop-Up	Rotating TDC Magnus Hop-Up, Helium Flat Hop eraser
Barrel thread	24 mm CW
Electronic system	GATE ASTER II ETU, Bluetooth 5.2
Motor	Specna Arms DarkMatter High Speed 27-35K brushless
Battery space	Large space under breech cover for stick-type battery
Spring system	Enter & Convert quick spring change

For power options and maintenance, consider our batteries and chargers to optimize performance, and explore compatible accessories in the tactical gear section.