Specna Arms SA-J21 FLEX AK AEG Assault Rifle
The Specna Arms SA-J21 FLEX is a lightweight and rugged AK-style electric airsoft rifle built for players who want modern performance, strong ergonomics, and classic Eastern-platform handling. Developed in collaboration with Well Pro, this AEG combines a durable polymer construction with metal reinforced components for reliable use in CQB, woodland games, and dynamic skirmishes.
The replica features a metal 14mm CCW muzzle device, metal outer barrel, dummy gas tube, steel-reinforced front assembly, and a practical folding stock adjustable in 6 positions. The railed handguard and top rail allow easy customization with grips, lights, lasers, optics, and other accessories from our airsoft accessories and red dots and scopes collections.
SA ETU Performance
Inside, the SA-J21 FLEX is equipped with the Specna Arms SA ETU, giving players programmable fire modes, pre-cocking, and improved trigger response. This makes the rifle adaptable to semi-auto focused CQB games, controlled burst scenarios, or full-auto outdoor play.
Key Features
-
Lightweight FLEX™ polymer body for fast handling
- Metal and steel reinforced external parts
- SA ETU with programmable fire modes
- Quick spring change system
- Version 3 gearbox
-
Folding 6-position adjustable stock with cheek riser
- Ambidextrous fire selector and magazine release
-
14mm CCW thread for suppressors and tracers
- 180 BB mid-cap magazine included
-
DEANS / T-connect plug for improved electrical efficiency
Built for AK Platform Fans
With its 6P70 and 5.45x39 style markings, the SA-J21 FLEX is a strong choice for players who appreciate realistic AK-inspired details while still wanting a modern, modular electric airsoft assault rifle. Browse more models in our Specna Arms collection or explore all airsoft guns.
Package Includes
- Specna Arms SA-J21 FLEX replica
- 2x mid-cap magazines
- BB speedloader
- Cleaning rod
Battery and charger are not included. We recommend choosing a compatible battery and charger from our airsoft batteries and chargers collection.
Specifications
| Brand |
Specna Arms |
| Model |
SA-J21 FLEX |
| Platform |
AK AEG |
| Power Source |
Electric |
| Material |
Polymer, aluminium, steel |
| Colour |
Black |
| Length |
86 cm |
| Minimum Length |
79.5 cm |
| Weight |
2660 g |
| Muzzle Velocity |
350 FPS |
| Gearbox |
Version 3 |
| Hop-Up |
Adjustable |
| Inner Barrel Length |
360 mm |
| Magazine Capacity |
180 BBs |
| Fire Modes |
Semi-auto, full-auto, adjusted burst |
| MOSFET / ETU |
Yes, SA ETU |
| Quick Spring Change |
Yes |
| Connector |
DEANS / T-connect |
| Thread |
14mm CCW |
| Battery Included |
No |
