Thats the Weaver Quad Lock that came out in 2004. The Weaver site is not that up to date, don't know whats wrong with them these days?
Anyway those rings are just like the regular tried and true rings but instead of the steel top strap they have two straps of aluminum. Those rings hold a scope even better than the old rings and only cost $9 at Walmart <---- where have I read that before?
Check on AR and some guys have been using that ring on big bores with great success.
As far as I know the Picatiney and Weaver are the same fit wise. I have a Farrell base and it uses Weaver style rings.
Those quad locks are only in high so far but what with the high comb on Kimbers it's a perfect fit and they are very light weight along with being easily detachable.