If you have a paper mate pen the upgrade can cost $0, I just swapped out teh trigger spring with one froma paper mate pen, lots of other people have done it rimfire central. or you can buy a rifle basix trigger, I think there less then $100 in the US.

If you do the pen job you will need to shim teh side of the trigger because with the lighter spring alot of slop is reviled in the trigger. so just a small peice of brass or i even used pieces of a pop can for a little while.

Just remove the bottom c clip and the trigger and teh spring will come out then just throw in your new one. and place your shims in the little inlet on the trigger. if you need help or anything just Pm me.

O yeah the pen trick make a great trigger its nice and light but still very crisp with no Creap. Just make sure you test your work by giving it a good bump test to make sure it doesnt set off.