KJ Works 1911 GBB: specs, joules & FPS
Complete specs KJ Works GBB (gas blowback)
KJ Works 1911 GBB: 0.89 J, 310 FPS, 940 g, 24 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 | KJ Works |
|---|---|
| Model | 1911 GBB |
| Category | Pistols |
| Power source | GBB (gas blowback) |
| Platform | 1911 |
| Weight | 940 g |
| Length | 218 mm |
| Magazine | 24 rounds |
| Hop-up | Adjustable |
Weighs 940 g: heavier than 69% of GBB replicas in the same category in the database (466 with weight).
At 0.89 J it is more powerful than 82% 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 |
|---|---|---|---|
| EMG Cybergun Colt Licensed 1911 M45A1 GBB (T8) - FDE (by Army Armament) | 0.84 J | 300 | 950 g |
| AW Custom NE10 1911 Officer Size GBB | 0.89 J | 310 | 860 g |
| AW Custom NE10 1911 Officer Size GBB - Black Slide / Silver Frame | 0.89 J | 310 | 860 g |
| AW Custom NE10 1911 Officer Size GBB - Silver Slide / Black Frame | 0.89 J | 310 | 860 g |
| KJ Works Hi Capa GBB (KP-08) | 0.98 J | 325 | 940 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.