nice response , the bullseye hasn't got tis selector in stock yet , the dust cover latch dont have the right spring it seems , any hint to were the springs are hiding and thanks the response was quicker than i imagine .
View attachment 77965
View attachment 77965
looks from the pics like the bolt has been cranked down pretty tight?
if it's just not clicking the tip is to slightly bend it so it engages the notches, it's not the tension from the bolt should be holding it as there's usually a brass sleeve to prevent it from being squeezed too tightly and being stiff.
something like this: https://www.bullseyecountrysport.co.uk/cyma-airsoft-ak-series-fire-selector-c203-33497-p.asp