I know someone has asked this before, but who makes the M70 safety conversion for a CZ550? Also how dificult is the installation? I'd like to hear from someone who's done it themself, if possible.

Jim Brockman uses them on his custom CZs, they need gunsmith installation unless your a good machinest...Give Jim a call at 208-326-5050

Ooooops! that Brockman number is 208-934-5050

AHR sells them. their number is 406-961-4944. I have one on order, as well as two triggers, for a .416 and a .375 I am building for clients right now. Like any M70 safety, you have to know how to do it. I have had them drop right in, and then I have literally spent hours fighting them and using up every cuss word I knew.