Here's a little gizmo I found on Excals forum. In order to use it, your trigger guard has to be any amount less tha 1/4" thick just below the trigger. It will fit Parkers. The guy I talked to said most Hortons have too much creep for it to work on them, but I may have misunderstood him. My only Excal w/ factory stock is .110" too thick, it's trigger is just fine as is, but I may fit one to it to see what it gives me, as I have an extra stock laying around. It will cut your trigger pull by at least 50% and in most cases more. I ordered one of them and told the guy about Excals, he had never heard of them. Later on, I saw I had a pm on Excal. This guy had botched my credit card # up, joined Excal forum so he could pm me to call him back!! If the gizmo is half as good as that, it's gonna be a keeper!! Here ya go:http://www.ezpulltriggerassist.com/