Marksman MK12 Mod 0 Gen 2 GBB: specs, joules & FPS
Complete specs Marksman Gas NBB (non-blowback)
Marksman MK12 Mod 0 Gen 2 GBB, NBB: 1.14 J, 350 FPS, 3,880 g, 30 rounds. Full specs from the official source, with FPS for every BB weight.
Power
Above Italy's 1 J limit
Italian shops sell versions tuned below 1 J: ask the shop which version they ship.
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 | Marksman |
|---|---|
| Model | MK12 Mod 0 Gen 2 GBB |
| Category | Assault rifles & carbines |
| Power source | Gas NBB (non-blowback) |
| Platform | AR/M4 SERIES |
| Weight | 3,880 g |
| Length | 950 mm |
| Magazine | 30 rounds |
| Hop-up | Adjustable |
Weighs 3,880 g: heavier than 100% of NBB replicas in the same category in the database (37 with weight).
Similar alternatives
Replicas of the same type and category that stay within the Italian 1 J limit.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| Tanaka Works Arisaka Type38 Infantry Ver.2 Gray Steel Gas | 0.84 J | 300 | 3,350 g |
| Tanaka Works Type44 Carbine Ver.2 Gray Steel Gas | 0.84 J | 300 | 3,350 g |
| Tanaka Works Type97 Sniper Rifle Ver.2 Gray Steel | 0.84 J | 300 | 3,350 g |
| EMG Noveske N4 M4 GBB (MWS System) by Double Eagle - Black (Gen2) | 0.95 J | 320 | 2,750 g |
| Marushin Mauser Kar98K Sporter Black HW Walnut Stock (6mm Gas Version) | 0.84 J | 300 | 3,140 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 | 350 | 107 |
| 0.25 g | 313 | 95 |
| 0.28 g | 296 | 90 |
| 0.30 g | 286 | 87 |
| 0.32 g | 277 | 84 |
| 0.36 g | 261 | 80 |
| 0.40 g | 247 | 75 |
Theoretical calculation at constant energy (1.14 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.