Don’t know the exact history of your second-hand gun, that is ways I buy new.
But, if it’s working, functions and got it for free you should be very happy it not broken, accept it as it is and be thankful you got a good friend.

Good to go, if you ask me and don’t think it’s a problem unless it’s making…Read more

Looks okay to me.
The shear looks a bit different with a relief cut in it, but KG might have updated it ?

~ Greg
Yes, the shear has a relief cut in it.
Look inside the receiver of this image: The spring has a strange curvature, the screws why it is white. The production date of this gun is…Read more