These are QD backup sights that designed to only use a size 8 or white lego rubber band. They are not very accurate though because you cannot adjust them(something I hope to fix in the future) neither are they very low profile when folded down. I mainly just wanted these to be quick detach and almost 100% 3D printed.

As for instructions just loop the band around the bottom hole part of the main body then slide in the clamper in the same bottom part and loop it around that. Then put whatever sight in on the top line it up with the hole on the main body and slide the pin in.

SUPPORTS ON!!!!!!!!