RRA SA-P03 Prime™ Aster II ETU BLDC™ - Black

The Specna Arms RRA SA-P03 PRIME™ Aster II ETU BLDC™ is a premium electric airsoft carbine from the PRIME™ line, combining a licensed Rock River Arms design with internals that match serious custom builds. It’s aimed at players who want top performance and reliability without immediate upgrading.

Externals and build quality

The receiver features a Nano Coating finish to better resist scratches and wear, helping the rifle keep its fresh-out-of-the-box look for longer.
The outer barrel is marked with an individual serial number confirmed by a hologram, so you always know you have a genuine PRIME replica.

Key external features:

• 14mm CCW thread on the muzzle – ready for suppressors or flash hiders

• QD-style pistol grip for a secure, ergonomic hold

• 6.02 mm precision steel inner barrel for improved accuracy and consistency

Altogether, the SA-P03 PRIME is perfectly suited for both weekend skirmishes and more demanding games where consistent performance really matters.

Accuracy package – Magnus™ TDC + Helium™ Flat Hop

For accuracy, Specna Arms uses the Magnus™ TDC (Top Down Center) rotary Hop-Up chamber, which:

• applies pressure straight from above and centered,

• allows very fine and stable adjustment,

• works great with heavier BBs.

The chamber is paired with a Helium™ Flat Hop bucking, which:

• stabilizes the BB in flight,

• keeps a flat trajectory with a slight lift at the end.

The result is excellent accuracy and repeatability straight out of the box, no immediate need to replace the chamber or bucking.

Aether™ Gearbox – built for power

Inside, the SA-P03 PRIME houses the new reinforced Æther™ gearbox (patent protected), designed to handle strong springs (up to around M140) and make servicing easier.

The gearbox provides:

• main spring release function – kinder to the internals after a game

• inspection windows for pre-cocking and AOE

• reinforced front section to reduce the risk of cracking

• adjustable trigger travel

• guide screw holes for perfect shell alignment

Internal parts include:

• reinforced polymer piston with full steel rack

• aluminium pneumatic set

• bearing spring guide

• CNC steel gears with 16:1 ratio

• 8 mm bearings – J-Cage ball bearings for motor and sector gear, 8 mm bushing for the spur gear

• GATE solarTrigger™ ready to work with the Aster II

This is a spec list you’d normally expect from a properly upgraded custom AEG, not a stock replica.

Dark Matter™ brushless motor – the heart of the system

The PRIME series uses the Specna Arms Dark Matter™ High Speed 27–35k brushless motor. Compared to standard brushed motors, it offers:

• much lower power consumption – you can shoot far more BBs on a single battery charge

• faster trigger response – the rifle fires almost instantly as you pull the trigger

• more stable operation with less heat build-up

For the player this means:

• the option to run smaller, lighter batteries,

• high rate of fire even with stronger springs,

• longer motor life thanks to the lack of carbon brushes.

Aster II Bluetooth® ETU – smart control unit

From factory, the rifle is equipped with a GATE™ Aster II Bluetooth® ETU module, replacing traditional trigger contacts with a programmable electronic unit.

Key functions:

• Bluetooth connection to a mobile app

• adjustable trigger sensitivity

• Binary trigger (shot on pull and release)

• pre-cocking adjustment for instant shots

• Active Brake

• battery and motor protection (undervoltage, overvoltage, etc.)

• Sniper mode and other fire control options

The unit is manufactured to MIL-V-173C standard, giving it enhanced resistance to adverse conditions.

ESA2™ quick-change spring system

With the ESA2™ quick-change spring system, you can swap the main spring without opening the gearbox – just split the rifle, pull out the spring guide and change the spring.

In the box you get two springs – M90 and M135, so you can:

• run the M90 for CQB and low-limit environments,

• use the M135 for outdoor games with higher energy limits (always check local field rules).

Perfect if you play different types of events and don’t want to own multiple rifles.

Package contents

Included in the box:

• Specna Arms RRA SA-P03 PRIME™ replica

• 2× S-MAG mid-cap magazines

• M90 spring

• M135 spring

• BB speedloader

• cleaning rod

• Small Tamiya to Deans (T-plug) adapter

Note: The battery and charger are not included and must be purchased separately.