i was browsing youtube and came across this video. i have not tried it and doubt i will. my sigma is for HD not a competition gun. i don't know nor do i endorse the maker of the video, i just thot i'd share the video for those interested. enjoy.
Sigma Trigger Fix / Mod DIY walk through for beginners EASY - YouTube
Sigma Trigger Fix / Mod DIY walk through for beginners EASY - YouTube