This is the updated Gen 2 Flex from Specna Arms, an X-ASR MOSFET version, equipped with the Gate X-ASR Smart Fuse MOSFET, providing diagnostics while enhancing trigger response.
The Second Generation version features the advanced AETHER™ gearbox shell and Magnus TDC HOP-up unit of Specna's PRIME™ series, providing enhanced long-range performance and making gearbox upgrading a simpler process.
Also inside is the Helium™ Flat Hop and quick-change spring feature.
The TDC Magnus rotary Hop-Up chamber helps give precise trajectory adjustment.
The Helium Flat Hop bucking offers longer-range stability.
The reinforced Aether gearbox also integrates inspection windows, alignment points, and a spring release system.
Specna Arms proudly presents the FLEX ™ line of replicas, now with a factory-installed Gate X-ASR.
An affordable price combined with an innovative quick spring change system, great performance straight out of the box and high-quality components makes this series an excellent choice for both beginners and experienced airsoft players alike.
The factory fitted GATE X-ASR MOSFET provides improved trigger response, rate of fire, and durability.
Fitted with a Deans connector but includes a Deans to Tamiya adapter.
The upper & lower receiver, the M-LOK handguard, back-up sights, stock, buffer tube and the pistol grip are made out of nylon reinforced polymer.
The barrel, the flash hider, the charging handle, selector and forward assist are made out of aluminium alloy.
All of the screws, pins, the ejection flap and the dummy bolt are made out of steel.
There are markings and a unique serial number on the receiver.
Features a quick change spring system, ESA™. This allows for quick and efficient adjustment of the replica's power output without the need of a full workbench.
The replica has been fully adapted to work with LiPo and LiFe batteries.
Rotary style Hop-Up chamber for easier hop adjustments.
300rd high capacity polymer magazine.
High-quality precision barrel with a diameter of 6.03 mm.
The flash hider is a standard 14mm counter-clockwise thread.
The set does not include a battery or a charger. LiPo's can be found here, NiMh's can be found here. LiPo charger here, NiMh charger here.

Fires at: 290fps
Weighs: 2.2kg
Length: 710mm-190mm
Battery: 7.4v 1300mAh LiPo Sticks / 9.6v 1600mAh NiMh Nunchuck (Not Included)
Charger: Smart Charger (Not Included)

April 2026

Specna Arms SA-F03 Gen 2 with Gate X-ASR - Black