These Xtreme Tactical Rings from Burris offer amazing 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. 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.