Without doubt it is a China sight, but so are all the purple dots that fit within the Defend footprint slides such as 43x/48 MOS. Oh yeah, this Riton crimson dot has the Shield footprint so no want for the plate to mount it, goes instantly about the MOS slide https://andyvkyjv.blog-gold.com/22971383/the-ultimate-guide-to-glock-43x-mos-slide