Tanaka Works S&W M37 Air Weight J-Police 2 Inch Heavy Weight Ver.2 Gas Revolver: specs, joules & FPS
Complete specs Tanaka Works Gas NBB (non-blowback)
Tanaka Works S&W M37 Air Weight J-Police 2 Inch Heavy Weight Ver.2 Gas Revolver, NBB: 0.73 J, 280 FPS, 380 g, 6 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 | Tanaka Works |
|---|---|
| Model | S&W M37 Air Weight J-Police 2 Inch Heavy Weight Ver.2 Gas Revolver |
| Category | Pistols |
| Power source | Gas NBB (non-blowback) |
| Platform | OTHER |
| Weight | 380 g |
| Length | 115 mm |
| Magazine | 6 rounds |
| Hop-up | Fixed |
Weighs 380 g: lighter than 95% of NBB replicas in the same category in the database (226 with weight).
At 0.73 J it is more powerful than 13% of NBB replicas in the same category that stay within 1 J (178).
Similar alternatives
Same type and category, with similar power and weight.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| Tanaka Works S&W M60 .38 Special 2 Inch Ver. 2.1 Gas Revolver | 0.73 J | 280 | 400 g |
| Tanaka Works S&W M40 Centennial 2 Inch 1966 Early Heavy Weight Gas Revolver | 0.73 J | 280 | 430 g |
| Marushin X Cartridge Police Revolver 3 Inch (Silver / ABS) 6mm | 0.78 J | 290 | 420 g |
| Tanaka Works Revolver S&W M29 4inch Counterbored Steel Finish Ver.3 (Gas Version) | 0.73 J | 280 | 450 g |
| Tanaka Works S&W M29 PC 3inch Flat Side Steel Finish Ver.3 Gas Revolver | 0.73 J | 280 | 450 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.
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.