Specna Arms SA-PJ15 PRIME BLDC KPYK – AK Airsoft AEG Rifle, Black

Specna Arms SA-PJ15 PRIME BLDC KPYK – AK Airsoft AEG Rifle, Black

A modernized AK platform combining rugged steel construction, Ukrainian KPYK design and advanced electronic performance.

The Specna Arms SA-PJ15 PRIME BLDC KPYK is a premium electric airsoft rifle developed in collaboration with KPYK, a Ukrainian manufacturer specializing in modern firearm accessories.

Part of the Specna Arms PRIME series, the SA-PJ15 features a distinctive KPYK CRC 1U020 aluminium handguard, a DarkMatter High Speed brushless motor, programmable GATE ASTER II electronics with Bluetooth 5.2 and a reinforced Version 3 gearbox.

It is designed for experienced airsoft players seeking a modern AK replica with extensive adjustment capabilities and high-quality internal components.

Specna Arms × KPYK Collaboration

The SA-PJ15 combines the established AK platform with modern tactical design elements developed by KPYK.

The CRC 1U020 handguard and gas tube cover provide a contemporary appearance and practical accessory mounting options.

Aluminium KPYK Handguard with M-LOK

The rifle features a precision-made aluminium handguard with M-LOK and Picatinny interfaces.

These allow compatible tactical accessories to be installed, including foregrips, lights and mounting adapters.

Steel, Aluminium and Polymer Construction

The rifle uses a combination of steel, aluminium and polymer components.

Steel is used extensively throughout the main structure, including the outer barrel, receiver cover, trigger guard, magazine catch, fire selector and other components.

Aluminium is used for the KPYK handguard and selected external parts.

The pistol grip, adjustable tactical stock and magazines are manufactured from polymer.

Nano Coating Surface Finish

The receiver features a Nano Coating finish designed to improve resistance to everyday surface scratches.

Each rifle also carries an individual serial number.

DarkMatter Brushless Motor

The Specna Arms DarkMatter High Speed 27–35K brushless motor is a major feature of this PRIME-series replica.

Unlike conventional brushed motors, it does not rely on carbon brushes for electrical commutation.

Key advantages include:

• Fast trigger response

• High torque from low rotational speeds

• Improved energy efficiency

• Reduced brush-related wear

• Stable high-speed operation

• Lower heat generation under comparable operating conditions

This provides a modern powertrain suitable for a high-performance AEG configuration.

GATE ASTER II Bluetooth Electronic Control

The rifle is equipped with the GATE ASTER II electronic trigger unit, supporting Bluetooth 5.2 connectivity.

Through the GATE Control Station (GCS) application, users can configure operating parameters and access diagnostics.

Features include:

• Adjustable trigger sensitivity and reset

• Active braking from 0–100%

• Adjustable pre-cocking

• Programmable firing modes

• Sniper mode

• Low-battery warnings

• Cycle detection and diagnostic functions

• Firmware updates through GCS

Availability of advanced functions may depend on firmware version and software licensing.

Reinforced Version 3 Gearbox

The SA-PJ15 PRIME uses a Version 3 gearbox equipped with performance-oriented components.

These include:

• CNC-machined steel 16:1 gears

• 8 mm bearings and bushings

• Reinforced piston with steel teeth

• Steel cylinder

• Aluminium cylinder head and nozzle

• 6.02 mm precision inner barrel

The combination of a brushless motor and 16:1 gears provides a responsive mechanical foundation.

6.02 mm Precision Inner Barrel

The inner barrel has a diameter of 6.02 mm and a length of 450 mm.

Its performance depends on correct Hop-Up adjustment, BB quality and the condition of the complete airsoft system.

Magnus TDC Hop-Up with Helium Flat Hop

The rifle features a Magnus rotary TDC Hop-Up chamber and Helium Flat Hop bucking.

The TDC system is designed to provide consistent pressure on the Hop-Up contact area, allowing fine adjustment of BB backspin.

This combination supports repeatable BB trajectory when correctly configured.

Enter & Convert Quick-Change Spring System

The Enter & Convert system simplifies main spring replacement without requiring complete gearbox disassembly.

Additional M90 and M135 springs are included, allowing the user to adapt the rifle's performance to different airsoft field limits.

Actual muzzle energy must always be checked with a chronograph after changing springs.

Adjustable Tactical Stock

The rifle features an adjustable polymer tactical stock.

Overall length can be adjusted between 950 and 1030 mm, depending on the stock position.

Optics and Accessory Compatibility

The rifle offers several accessory mounting options:

• M-LOK interfaces

• Picatinny mounting rail

• AK-style side dovetail rail

• 24 mm CW muzzle thread

These allow the use of compatible optics mounts and other accessories.

Two 175-Round S-MAG Magazines

The package includes two S-MAG mid-cap magazines, each holding 175 BBs.

Together, they provide a total capacity of 350 BBs.

Performance and Intended Use

The supplied specification lists an approximate muzzle velocity of 430 FPS.

Actual performance may vary depending on the spring, BB weight and measurement conditions.

The rifle is suitable for outdoor airsoft, MILSIM and experienced players who appreciate extensive electronic configuration and premium internal components.

Key Features

• Specna Arms SA-PJ15 PRIME BLDC KPYK

• Modernized AK platform

• Specna Arms × KPYK collaboration

• Steel, aluminium and polymer construction

• KPYK CRC 1U020 aluminium handguard

• M-LOK and Picatinny mounting options

• Nano Coating surface finish

• Individual serial number

• DarkMatter High Speed 27–35K brushless motor

• GATE ASTER II Bluetooth 5.2 ETU

• Version 3 gearbox

• 16:1 CNC steel gears

• 8 mm bearings and bushings

• Reinforced piston with steel teeth

• 6.02 mm / 450 mm precision barrel

• Magnus TDC rotary Hop-Up

• Helium Flat Hop bucking

• Enter & Convert quick-change spring system

• Adjustable tactical stock

• AK-style side dovetail mount

• 24 mm CW muzzle thread

• Two 175-round S-MAG mid-cap magazines

• Additional M90 and M135 springs

• Approximate muzzle velocity 430 FPS

• Overall length 950–1030 mm

• Weight 3875 g

Technical Specifications

Package Contents

• 1× Specna Arms SA-PJ15 PRIME BLDC KPYK – Black

• 2× S-MAG 175-round mid-cap magazines

• 1× additional M90 spring

• 1× additional M135 spring

• 1× Mini Tamiya to T-Deans adapter

• 1× BB speedloader

• 1× cleaning rod

Battery and charger are not included.

Battery Recommendations

The rifle uses a T-Deans connector, with space for a stick-type battery under the receiver cover.

When using the weaker M90 spring, the supplier recommends a 7.4 V battery to reduce the risk of mechanical issues.

Always choose a compatible battery according to the manufacturer's instructions and available battery compartment space.

Why Choose the SA-PJ15 PRIME BLDC KPYK?

The SA-PJ15 PRIME combines the familiar AK platform with modern KPYK ergonomics and advanced internal technology.

Its key strengths are the DarkMatter brushless motor, GATE ASTER II electronics, CNC steel gears, Magnus TDC Hop-Up and quick-change spring system.

For experienced players looking for a premium AK-style AEG with extensive configuration options straight out of the box, it offers a particularly attractive combination of features.

Specna Arms SA-PJ15 PRIME BLDC KPYK – a modern AK built around next-generation technology.