KJW Glock 27 spray gas from behid when firing

[kar120c]

My G27 with guarder hammer spring, Guarder recoil spring while firing almost every time produces a clous of gas that sometimes hit my face.
This happens with two magazines, both stock Kjw.
This issue surely cause a large comsumption of gas; anyone can tell me a way to solve?

[Kos-Mos]

Your nozzle might be cracked, letting lots of gaz leave from behind in the piston area.

What temperature is it when you try to shoot?
Anywhere under 15°c that is normal, you just don't see the cloud normally.

[kar120c]

Originally Posted by Kos-Mos

Your nozzle might be cracked, letting lots of gaz leave from behind in the piston area.

What temperature is it when you try to shoot?
Anywhere under 15°c that is normal, you just don't see the cloud normally.

The nozzle is good and I was firing inside home at 22°c
I noticed that with a Marui Magazine which is not full compatible this issue doesn't nott occur.
Maybe a mag valve issue?

[kar120c]

the issue seems to be solved upgrading the piston head with the the Airsoft Surgeon one

[Styrak]

Originally Posted by Asher

I never come across such a thing. So I don't know.

So then don't post.

[shelcoof]

This happens to every single one of my Glocks (TM design) with random mags. It usually happens when the Magazine is very full and warm.

I'm not sure how to pin point the problem but it usually goes away for me. I'm guessing it can be magazine specific as some of the magazines are prone to having it happen to it than others.