KPYK SA-PJ14 Prime™ Aster II ETU BLDC™ - Black

The Specna Arms x KPYK SA-PJ14 PRIME™ Aster II ETU BLDC™ is an electric airsoft carbine (AEG) for players who want a modern, durable AK that already feels “upgraded” from the factory.

It combines a mostly steel construction, tactical external parts from KPYK, carefully chosen internal components and a GATE ASTER II processor unit that manages and protects the whole system. The result is a rifle that is ready for serious outdoor games as soon as you open the box.

Solid Steel Construction – Realistic AK Feel

This replica is designed to feel like a real firearm in your hands – solid, heavy and with minimal wobble.

• Many key parts are made of steel (outer barrel, dust cover, gas tube, trigger guard, magazine catch, selector, stock hardware and more), giving the gun strength and realistic weight.

• Aluminium is used where you want toughness but less weight – for example the M-LOK handguard with CRC 1U004 gas tube cover from KPYK, iron sights, muzzle device, side rail and stock guides.

• Polymer is used for the pistol grip, adjustable tactical stock and mid-cap magazine – comfortable to hold yet durable.

The receiver is finished with Nano Coating, helping to protect it from scratches and wear.
With a weight of about 3985 g, this is not a toy-like rifle – it feels like serious kit.

Modern External Setup – Ready for Accessories

The SA-PJ14 PRIME™ keeps the soul of an AK but adds modern functionality:

• M-LOK handguard – mount a flashlight, vertical grip, PEQ box or other accessories exactly where you need them.

• Top Picatinny rail – ideal for a red dot sight or compact optic.

• Side dovetail rail – for traditional AK-style optic mounts.

• 24 mm CW thread on the muzzle – ready for flash hiders or suppressors.

• Plenty of space for a stick-type battery under the dust cover.

• Adjustable tactical stock – set the length to fit your body and your gear (plate carrier, chest rig, etc.).

This gives you a rifle that is comfortable to use, easy to set up for different roles and fully compatible with modern accessories.

PRIME™ Internals – Field-Ready Performance

The Prime Series is built so that you don’t need to upgrade the internals immediately. Inside the SA-PJ14 you will find:

• 6.02 mm precision inner barrel for better accuracy and consistency.

• TDC Magnus™ rotary Hop-Up chamber – very fine, stable hop adjustment that holds its setting.

• Helium™ Flat Hop bucking for better BB lift and a more stable flight path, especially with heavier BBs.

• Steel cylinder for durability.

• CNC steel gears with 16:1 ratio – faster cycling and crisp response.

• Reinforced piston with steel teeth – stronger and more resistant to wear.

• Aluminium cylinder head and aluminium nozzle for improved air seal.

• 8 mm J-Cage ball bearings and an 8 mm plain bearing on the bevel gear.

Out of the box, the rifle delivers around 430 FPS with 0.20 g BBs, which makes it ideal for outdoor games where you need range and consistent hits. As always, power must match the rules of your local field.

DarkMatter™ Brushless Motor – Fast and Efficient

At the heart of the drivetrain is the Specna Arms DarkMatter™ High Speed 27–35K brushless motor:

• Brushless design – no carbon brushes means less wear and longer life.

• Very fast trigger response – perfect for quick semi-auto shots.

• High efficiency – uses battery power more effectively and runs cooler.

For the player, this translates to a rifle that reacts immediately when you pull the trigger and keeps a smooth, strong performance over long games.

GATE ASTER II Processor Unit – Smart Control Inside

The electronics are handled by the GATE ASTER II processor unit. This is not a basic MOSFET – it is a full processor unit that controls and protects the rifle while allowing you to customise how it behaves.

Key functions of the ASTER II processor unit:

• Works with both brushless and brushed motors.

• Adjustable active brake from 0 to 100% – you can choose how fast the gearbox stops after each shot.

• Pre-cocking (0–5 levels) and de-cocking – for faster first shots while being more gentle on the spring and gears.

• Low battery warning – helps prevent over-discharging and damaging your battery.

• Very low power draw in standby.

• Improved cycle detection and EMC-shielded PCB for better reliability.

• Fully adjustable trigger behaviour, including trigger reset point.

• Configuration and firmware updates via the GCS app over Bluetooth 5.2 – so your rifle can gain new features over time.

Firing modes (depending on your settings) include:

• Semi-auto

• Full-auto

• Adjustable burst (programmable through the processor unit)

For players who are not experts in electronics, the main benefit is simple: the processor unit helps keep the rifle and battery safe, and lets you make the trigger and firing modes feel exactly the way you like.

Quick Spring Change – Enter & Convert™

The rifle features the Enter & Convert™ Quick Spring Change system, which lets you change the main spring without a full gearbox disassembly.

Included in the box are two extra springs:

• M90 – for lower power, useful for stricter fields or closer-range games.

• M135 – for higher power, if local rules allow it.

With this system, you can adapt one rifle to different fields and roles just by changing the spring.

What’s Included

• Specna Arms x KPYK SA-PJ14 PRIME™ Aster II ETU BLDC™ airsoft carbine

• 2× S-MAG mid-cap magazines

• M90 spring

• M135 spring

• BB speedloader

• Cleaning rod

• Small Tamiya to DEANS (T-connect) adapter

Battery and charger are not included.
We recommend a good quality LiPo or Li-Ion battery with a DEANS / T-connect plug.

Who Is This Rifle For?

This replica is a great choice if you:

• Want a modern AK-platform rifle with realistic weight and a solid, steel feel.

• Prefer to avoid doing a full internal upgrade right after buying a gun.

• Value fast trigger response, strong performance and stable fps.

• Mainly play outdoor games and need good range and accuracy.

• Like having a processor unit that you can adjust and update via your phone instead of opening the gearbox.

Key Reasons to Choose the SA-PJ14 PRIME™

• Factory-tuned performance – you get precision barrel, quality hop-up, steel gears, reinforced piston and a brushless motor from day one. No need to invest in extra internal parts right away.

• Robust steel build – feels serious in your hands and stands up better to rough use than lighter, more toy-like replicas.

• Smart GATE ASTER II processor unit – protects your battery and mechanics, lets you tune trigger response and modes, and stays up to date via firmware updates.

• DarkMatter™ brushless motor – delivers quick trigger response and efficient power use, giving you a performance edge in game.

• Modern AK setup with M-LOK – easy to configure with optics, light, grip and other accessories to match your personal playstyle.

• Quick power tuning with Enter & Convert™ – one rifle that can be adjusted for different field limits simply by changing the spring.

• Combination of Specna Arms and KPYK – proven brands providing both strong internals and a practical, tactical external design.

If you are looking for a reliable, modern AK-style rifle that already feels upgraded straight out of the box, the SA-PJ14 PRIME™ is a very strong candidate.