GHK M4 GBBR (Navy Seal, 10.5 inch RAS): specs, joules & FPS
Complete specs GHK CO2
GHK M4 GBBR (Navy Seal, 10.5 inch RAS), CO2: 1.41 J, 390 FPS, 3,130 g, 40 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 | GHK |
|---|---|
| Model | M4 GBBR (Navy Seal, 10.5 inch RAS) |
| Category | Assault rifles & carbines |
| Power source | CO2 |
| Platform | AR/M4 SERIES |
| Weight | 3,130 g |
| Length | 778 mm |
| Magazine | 40 rounds |
| Hop-up | Adjustable |
Weighs 3,130 g: heavier than 71% of CO2 replicas in the same category in the database (65 with weight).
Similar alternatives
Replicas of the same type and category that stay within the Italian 1 J limit.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| GHK AK74 GBBR | 0.95 J | 320 | 3,460 g |
| VIVA Arms Mosin Nagant M44 Carbine (Real Wood CO2 Version) | 0.95 J | 320 | 3,760 g |
| EMG SAI GRY M4 GBB (CYMA CGS System) - 6.5 inch BK | 1.34 J | 380 | 3,080 g |
| GHK M4 RAS GBB 12.5 inch V2 2019 Navy Seal | 1.49 J | 400 | 3,080 g |
| GHK M4 GBBR V3 (10.5 inch COLT Licensed) | 1.41 J | 390 | 2,850 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 | 390 | 119 |
| 0.25 g | 349 | 106 |
| 0.28 g | 330 | 100 |
| 0.30 g | 318 | 97 |
| 0.32 g | 308 | 94 |
| 0.36 g | 291 | 89 |
| 0.40 g | 276 | 84 |
Theoretical calculation at constant energy (1.41 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.