Tokyo Marui M870 Breacher: specs, joules & FPS
Complete specs Tokyo Marui Gas NBB (non-blowback)
Tokyo Marui M870 Breacher, NBB: 0.58 J, 250 FPS, 2,200 g, 30 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.
The main source does not give the velocity: FPS taken from the page of the same model on www.redwolfairsoft.com.
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 | M870 Breacher |
| Category | Shotguns |
| Power source | Gas NBB (non-blowback) |
| Platform | M870 |
| Weight | 2,200 g |
| Length | 515 mm |
| Inner barrel | 197 mm |
| Magazine | 30 rounds |
shotgun a gas a pompa (tipo non previsto); doppio hop-up
Weighs 2,200 g: lighter than 75% of NBB replicas in the same category in the database (12 with weight).
Similar alternatives
Same type and category, with similar power and weight.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| Tokyo Marui M870 Wood Stock Type | 0.58 J | 250 | 2,660 g |
| Tokyo Marui M870 Tactical | 0.58 J | 250 | 2,680 g |
| Maruzen M870 Black Version | 0.45 J | 220 | 2,550 g |
| Maruzen M870 Wood Stock Version | 0.45 J | 220 | 2,550 g |
| Maruzen M870 Extension Custom Black Version | 0.45 J | 220 | 2,600 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 | 250 | 76 |
| 0.25 g | 224 | 68 |
| 0.28 g | 211 | 64 |
| 0.30 g | 204 | 62 |
| 0.32 g | 198 | 60 |
| 0.36 g | 186 | 57 |
| 0.40 g | 177 | 54 |
Theoretical calculation at constant energy (0.58 J). Real-world values can differ slightly with hop-up and replica.
Data source
Every value on this page comes from the manufacturer's official product page, checked on 2026-11-07.
Official Tokyo Marui product page ↗ tokyo-marui.co.jp
Spotted a wrong or missing value? Let us know.