Revolver Problem
 

I got this gun and I am not sure really what I can do to fix it. It looks like the small arm is not hitting the gas release either hard enough or not hitting it at all. When I push on the hammer the little piece does not press against the gas release. I am not sure if the small piece can be replaced or if there is someway to adjust it but any help would be nice.

http://i126.photobucket.com/albums/p...Airsoft014.jpg
http://i126.photobucket.com/albums/p...Airsoft015.jpg