Tokyo Marui M4 MWS Carbine (ZET System) GBBR M4: specs, joules & FPS
Complete specs Tokyo Marui GBB (gas blowback)
Tokyo Marui M4 MWS Carbine (ZET System) GBBR M4: 0.73 J, 280 FPS, 2,960 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 | M4 MWS Carbine (ZET System) GBBR M4 |
| Category | Assault rifles & carbines |
| Power source | GBB (gas blowback) |
| Platform | AR/M4 SERIES |
| Weight | 2,960 g |
| Length | 780 mm |
| Magazine | 35 rounds |
| Hop-up | Adjustable |
Weighs 2,960 g: heavier than 60% 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 M4 MWS (ZET System) GBBR M4 | 0.73 J | 280 | 2,960 g |
| Tokyo Marui URGI MK16 MWS GBBR (11.5 inch SOPMOD Block 3) | 0.84 J | 300 | 2,710 g |
| RWA B.A.D. SBR GBBR | 0.73 J | 280 | 2,360 g |
| RWA B.A.D. 556-LW GBBR | 0.84 J | 300 | 2,570 g |
| ARCHWICK Colt Canada L119A2 British Special Forces Rifle AWS GBB (Ultimate Edition) | 0.95 J | 320 | 2,810 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
Tokyo Marui M4A1 MWS Review - The OG modern GBBR · Cannon Flannel
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.