those arnt colt
some factory colt parts do have the s on them , stag, I think,,,, but not the tick mark like that. if you look at a close up of a real m4 they have tick marks but not like that. real colt select fire safety has a tick mark just like the one on a factory stag safety. like a v cut into it. the 6920 still does not have any tick or selector stops. maybe one day..