Not your typical delta point pro (dpp) footprint. - SIG SAUER Romeo-X Pro 1x24mm Open Emitter Reflex Red Dot Sight

For those who don’t know, SIG likes to play a cruel trick on his customers and say they use an industry standard Delta Pro Point footprint when in fact, it is not. SIG likes to use her own version of the Delta point pro footprint, which has slightly smaller diameter lugs therefore not allowing the lugs from the optic plate to sit in the recess properly. Besides that it is a great optic has tons of features.