Available in both 1 icnh and 30mm sizes and a choice of four ring heights, Burris now offers Quick Detach (QD) models in 1 inch and 30mm in Medium and X-High. Xtreme Tactical Rings will work with any Weaver or Picatinny-style bases. The extra-high 1 inch version is ideal for AR15/M16 flattop receivers where scope height is critical.