Hi Fellas, so I went to this large guns & shooting store here in OK. City next to I40 and their in store gun smith told me that the Leupold PRW rings would fit on picatinny rails. Long story made short. No,, they don't fit "tight". When I confronted their gun smith he told me "I put lots of them on rifles all day." So, if your one of them fellas that had this gun smith install one of these PRW rings on your picatinny rail for your rifle you better check it out. And I'm not knocking Leupold rings they make some of the best stuff for rifles.