Tokyo Marui Type 89 J.G.S.D.F. GBBR (ZET System): specs, joules & FPS
Complete specs Tokyo Marui GBB (gas blowback)
Tokyo Marui Type 89 J.G.S.D.F. GBBR (ZET System): 0.73 J, 280 FPS, 3,640 g, 35 rounds. Full specs from the official source, with FPS for every BB weight.
Power
Within Italy's 1 J limit
Energy computed from the velocity with 0.20 g BBs, the standard weight manufacturers and shops use to measure FPS.
For information only, based on the source's data for this version. Not legal advice: always check current local law and the version the shop sells.
Technical specifications
| Brand | Tokyo Marui |
|---|---|
| Model | Type 89 J.G.S.D.F. GBBR (ZET System) |
| Category | Assault rifles & carbines |
| Power source | GBB (gas blowback) |
| Platform | TYPE 89 |
| Weight | 3,640 g |
| Length | 920 mm |
| Magazine | 35 rounds |
| Hop-up | Adjustable |
Weighs 3,640 g: heavier than 90% of GBB replicas in the same category in the database (314 with weight).
At 0.73 J it is more powerful than 14% of GBB replicas in the same category that stay within 1 J (28).
Similar alternatives
Same type and category, with similar power and weight.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| Tokyo Marui AKM | 0.73 J | 280 | 3,550 g |
| Tokyo Marui AKX | 0.73 J | 280 | 3,550 g |
| WE AK74 GBB (Real Wood Version) | 0.63 J | 260 | 3,440 g |
| Tokyo Marui M4 MWS (ZET System) GBBR M4 | 0.73 J | 280 | 2,960 g |
| Tokyo Marui M4 MWS Carbine (ZET System) GBBR M4 | 0.73 J | 280 | 2,960 g |
Velocity with different BB weights
At the same energy, heavier BBs leave the barrel slower. Expected velocity with the most common weights:
| BB weight | FPS | m/s |
|---|---|---|
| 0.20 g | 280 | 85 |
| 0.25 g | 250 | 76 |
| 0.28 g | 237 | 72 |
| 0.30 g | 229 | 70 |
| 0.32 g | 221 | 67 |
| 0.36 g | 209 | 64 |
| 0.40 g | 198 | 60 |
Theoretical calculation at constant energy (0.73 J). Real-world values can differ slightly with hop-up and replica.
Video
NEWEST Challenger! - Tokyo Marui Type 89 J.G.S.D.F Gas Blowback Rifle | RedWolf Airsoft RWTV · RedWolf Airsoft
Video from an independent channel, matched by the replica name: check it is the same version. It loads from YouTube only when you press the button.
Data source
The values on this page come from the product page of the shop redwolfairsoft.com, checked on 2026-11-07. The manufacturer does not publish full specs: values may refer to the version that shop sells.
Shop product page ↗ redwolfairsoft.com
Spotted a wrong or missing value? Let us know.