Small leak

[athlete070]

I was shooting my gun today and I noticed when my face was close to the back plate there was a small leak. It only could be felt when i shot the gun. Any ideas? When i took the back plate off and put my ear to the noid i could hear a slight hiss but no air coming from it. Any help would be great.

[Vantage_TeS]

Perfectly normal. Gas going into the ram has to vent somewhere when the ram reveses direction.