APS TX1 Xtreme GBB: specs, joules & FPS
Complete specs APS Gas NBB (non-blowback)
APS TX1 Xtreme GBB, NBB: 1.01 J, 330 FPS, 1,880 g, 36 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 | APS |
|---|---|
| Model | TX1 Xtreme GBB |
| Category | Assault rifles & carbines |
| Power source | Gas NBB (non-blowback) |
| Platform | AR/M4 SERIES |
| Weight | 1,880 g |
| Length | 435 mm |
| Magazine | 36 rounds |
| Hop-up | Adjustable |
Weighs 1,880 g: lighter than 95% 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 |
|---|---|---|---|
| Lancer Tactical SOLGW Licensed MK1 MWS GBB - Socom Version (by Angry Gun) | 0.95 J | 320 | 1,920 g |
| SAVIA M4 10.5 Inch MWS GBB (Naked Version) (MWS - Improved System) | 1 J | 328 | 2,150 g |
| Novritsch SSX303 Stealth Gas | 0.95 J | 330 | 1,650 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 | 330 | 101 |
| 0.25 g | 295 | 90 |
| 0.28 g | 279 | 85 |
| 0.30 g | 269 | 82 |
| 0.32 g | 261 | 80 |
| 0.36 g | 246 | 75 |
| 0.40 g | 233 | 71 |
Theoretical calculation at constant energy (1.01 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.