Vortex viper - Vortex Viper 1x24mm Reflex Red Dot Sight

Purchased the item with the idea of placing it on my glock beaware.... this dose not have the same foot print as rmr it is its own foot print due too its size and bolts i looked on the discription to see if anyware it said what foot print it was before ordering did not mention it on the description will also not fit sig p320[ca320] style slide doo to milling being slightly smaller THIS NOT A NEGATIVE REVIEW still happy with my purchase but definitely buyers be ware with all the different style foot prints out there