What is STI's front sight blade width? Rachel Zorn September 18, 2017 16:07 Updated Follow The competition width is .100″ while the carry width is .125″. Related articles What sight cuts and heights does STI use? How do I take my STI firearm apart and reassemble? What is the recoil spring weight in my gun? Does STI use any MIM parts? What can I expect the trigger pull weight to be on an STI handgun? Comments 0 comments Please sign in to leave a comment.