One look and you know Xtreme Tactical Rings are all about point-of-aim security and durability. The super-strong yet surprisingly lightweight six-screw aluminum rings anchor scopes in place on any Picatinny rail or Weaver-style base to deliver unfailing return-to-zero. Available in 1" and 30mm sizes a choice of four ring heights accommodates the installation of any sight from red-dots to large objective target scopes. The 1" height is perfect for all scopes on AR15/M16 flattop receivers providing proper cheek weld. Designed and built for the rigors of tactical shooting and massive recoil Xtreme Tactical Rings are not out of place on varmint rifles or big game rifles that may be exposed to the abuses of hard hunting and magnum recoils.