if i remember rightly,take frame of ,then unscrew the return spring which is on the top,then take the 2 circlips of the pins that go throught the trigger,the pins should push out ,make sure you put them back in the rite holes as the one at the back is the safety and has grooves in it. i think thats it.its been a while but i'm sure if i'm wrong some one will tell me
if youre putting an eclipse blade in make sure youve got the rite one because there were 2 when they came out.