#2. Umarex GLOCK 17 Gen4 Airsoft Pistol

Our Score 8.1 / 10 Score details
Specifications
| Brand | Umarex |
|---|---|
| Power Source | CO2 |
| Firing Mode | Semi-Auto |
| Blowback | Yes |
| Hop Up | Adjustable |
| Muzzle Velocity | 320 FPS |
| Magazine Capacity | 18 rds |
| Overall Length | 8 in |
Pros
- Durable, tight tolerances
- Solid hop and accessory fit
- Strong field-ready FPS
Cons
- Semi-auto only
- Short magazine capacity
- Velocity inconsistency
The Umarex GLOCK 17 Gen4 stands out in CO2 airsoft pistols thanks to its strong overall reliability and “field-ready” output at about 320 FPS. It uses blowback and an adjustable hop-up, so you can dial in consistency for better shot placement. Build quality feels tight, with solid fit for an accessory-friendly build and dependable cycling when you keep the mags maintained.
The trade-off is simple. It runs semi-auto only, and the magazine holds 18 rounds, so reloads come sooner during faster games. Some owners also report velocity inconsistency, which usually matters more in CO2 setups when the cartridges cool down. If you want a durable CO2 GLOCK-style sidearm for practical handgun matches, this is a good pick. If you need the smoothest consistency across long sessions, plan on careful CO2 handling and testing your hop-up settings.
