It's very simple. Remove the horseshoe clip on the safety side and take out the pin so you can remove the bolt release lever. Can't remember on the Shilen if it's a pin or a screw to hold it on. Timney has one screw to remove and replace to hold on the bolt release lever.
ETA: Just noticed you were talking about the safety....not the bolt release. Should be simple.
Last edited by 257heaven; 12/18/14.
