Excal ACP trigger for linkage type bows (Suppressor, Bulldog). Will not work with standard Matrix or Micro unless you can get a trigger stem. I bought this used off eBay, planning on using it for my Micro hybrid project, then the eBay Trigger Techs came along and made my project easier. It has obviously been used, but not hard. Guardian mount holes show loktite , a few minor scratches. Seems to function like it should, but I never even bolted it in a rail. $75 M/O, $80 PayPal (includes fees). Shipping is on me.