I purchased on Amazon. It is brand new - never used. I ended up purchasing a gun that already had one installed.
FXA12 PRO Multi Reticle Micro Red Dot Sight for RMR/507c Footprint – 2MOA Dot & 32MOA Circle Pistol Reflex Sight with Shake Awake & Lock Mode.
Texting is the best way to get in touch with me.