hi capa slide catch + thumb rest improved

I have slightly improved the slide catch part, 

I have reinforced the main bar and made it easier to release the slide one handed.

Disclaimer:

It still doesn't automatically lock on empty when shooting, it will lock when manually pulling the slide back though.

Also the “snap” fitting doesn't work perfectly and the piece can slide out a bit.

(This piece is only meant for Airsoft replicas)

Changes