BO Manufacture FABARM Licensed STF12 18 inch Ressort Spring Shotgun: specs, joules & FPS
Complete specs BO Manufacture Spring
BO Manufacture FABARM Licensed STF12 18 inch Ressort Spring Shotgun: 0.89 J, 310 FPS, 1,840 g, 30 rounds. Official specs.
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 | BO Manufacture |
|---|---|
| Model | FABARM Licensed STF12 18 inch Ressort Spring Shotgun |
| Category | Shotguns |
| Power source | Spring |
| Platform | STF12 |
| Weight | 1,840 g |
| Length | 925 mm |
| Magazine | 30 rounds |
| Hop-up | Fixed |
Weighs 1,840 g: lighter than 53% of spring replicas in the same category in the database (17 with weight).
At 0.89 J it is more powerful than 77% of spring replicas in the same category that stay within 1 J (13).
Similar alternatives
Same type and category, with similar power and weight.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| BO Manufacture FABARM Licensed STF12 11 inch Compact Spring Shotgun | 0.89 J | 310 | 1,770 g |
| BO Manufacture FABARM Licensed STF12 11 inch Short Spring Shotgun | 0.89 J | 310 | 1,260 g |
| Tokyo Marui SPAS-12 | 0.75 J | 285 | 2,000 g |
| Tokyo Marui M3 Super 90 | 0.65 J | 265 | 2,000 g |
| Maruzen CA870 Tactical II Shotgun | 0.73 J | 280 | 2,230 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 | 310 | 94 |
| 0.25 g | 277 | 85 |
| 0.28 g | 262 | 80 |
| 0.30 g | 253 | 77 |
| 0.32 g | 245 | 75 |
| 0.36 g | 231 | 70 |
| 0.40 g | 219 | 67 |
Theoretical calculation at constant energy (0.89 J). Real-world values can differ slightly with hop-up and replica.
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.
Available colours
The same model is also sold in these colours. The specs on this page refer to the first version; each colour links to its own page at the source.