I've in stock this trigger group. It's a genuine part from HR.
I decided to use it in my own, but it doesn't work.
When I push the trigger, nothing happends. the hammer doesn't move.
Hard for me to explain it with some accurate words, my english is too bad. So, I post some pics to explain the problem. it's easy to understand but not fix
If you have some explications or how to fix it, I'll be happy.