Maruzen P38 AC40.s GBB (Stainless Finish): specs, joules & FPS
Complete specs Maruzen GBB (gas blowback)
Maruzen P38 AC40.s GBB (Stainless Finish): 0.63 J, 260 FPS, 720 g, 12 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 | Maruzen |
|---|---|
| Model | P38 AC40.s GBB (Stainless Finish) |
| Category | Pistols |
| Power source | GBB (gas blowback) |
| Platform | P38 |
| Weight | 720 g |
| Length | 215 mm |
| Magazine | 12 rounds |
| Hop-up | Adjustable |
Weighs 720 g: lighter than 73% of GBB replicas in the same category in the database (466 with weight).
At 0.63 J it is more powerful than 10% of GBB replicas in the same category that stay within 1 J (351).
Similar alternatives
Same type and category, with similar power and weight.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| Maruzen P38 AC40.s GBB (Black Metal Finish) | 0.63 J | 260 | 720 g |
| Maruzen P38 (ac41) GBB | 0.58 J | 250 | 720 g |
| Tokyo Marui AM .45 | 0.73 J | 280 | 735 g |
| Maruzen P38 Detachable GBB | 0.58 J | 250 | 790 g |
| Maruzen P38 AC40 (Black Metal) GBB | 0.84 J | 300 | 730 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 | 260 | 79 |
| 0.25 g | 233 | 71 |
| 0.28 g | 220 | 67 |
| 0.30 g | 212 | 65 |
| 0.32 g | 206 | 63 |
| 0.36 g | 194 | 59 |
| 0.40 g | 184 | 56 |
Theoretical calculation at constant energy (0.63 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.