The CG Long-Range Rear Sight built by Centra is an extremely well made sight designed for long-range shooters and match rifle shooters. The sight is built around an aluminum body with highly polished stainless steel spindles on ball bearings. The threads are ground for extremely precise movements. Available in left hand thread model. The sight can be easily adjusted for zero points. The scales are machined on a bevel so they are easy to see from any position and the markings are easy to read. The sight comes set up for one fourth minute clicks. This sight accepts standard threaded irises from Centra, Gehmann, or Anschutz (not included).
Sinclair, Issue:3A, Page:211