xd40

Hello! I have an XD 40, and am wondering if it's possible to only use the OSP slide that is optics ready than retrofit it to 9mm? I would prefer to keep it as a .40 cal. and not make the change to 9mm. Do I have to swap to 9mm in order to get the OSP retrofit? Thanks Tim

Well I only have 3 handguns and one rifle. The xd I bought in 2012, the rifle and Glock I bought during Covid I was trying to protect my toilet paper and the 1911 Garrison I got 2 weeks ago.