ASG MK I Gas Non Blow Back Black: specs, joules & FPS
Complete specs Gas NBB (non-blowback)
ASG MK I Gas Non Blow Back Black, NBB: 1.32 J, 377.3 FPS, 550 g, 17 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.
For information only, based on the energy the manufacturer declares for this version. Not legal advice: always check current local law and the version the shop sells.
Technical specifications
| Brand | ASG |
|---|---|
| Model | MK I Gas Non Blow Back Black |
| Manufacturer code | 14728 |
| Category | DMR & sniper rifles |
| Power source | Gas NBB (non-blowback) |
| Platform | MK1/MK2 |
| Weight | 550 g |
| Length | 248 mm |
| Inner barrel | 120 mm |
| Magazine | 17 rounds |
| Hop-up | Adjustable |
| EAN / UPC | 5707843001991 |
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 | 377 | 115 |
| 0.25 g | 337 | 103 |
| 0.28 g | 319 | 97 |
| 0.30 g | 308 | 94 |
| 0.32 g | 298 | 91 |
| 0.36 g | 281 | 86 |
| 0.40 g | 267 | 81 |
Theoretical calculation at constant energy (1.32 J). Real-world values can differ slightly with hop-up and replica.
Data source
Every value on this page comes from the manufacturer's official product page, checked on 2026-11-07.
Official ASG product page ↗ actionsportgames.com