Kit includes one of each- Ultra Low Mass Sear, Litespeed Hammer, Race Disconnector Drop in for exceptional trigger on 1911 style pistols.
Manufacturer offers lifetime warranty. Just ad an EGW Sear Spring and an ISMI 17 lb mainspring for the ultimate trigger. Springs below 17 will cause light primer hits and slower hammer drop time. Tuning is necessary as with any trigger kit regardless of claims.