King Cobra 1 single pin slider...... The Poor Man's HHA [8D]!!!

Works great. Zero complaints so far. Easy adjustability in all directions, it stays put, and it doesn't make any noise. It's bright - you wouldn't want it any brighter. The fiber optics and bubble level are fully protected inside the scope (unlike the Vital Pro Slide that was junk IMO). For $80 it's a great value IMO. Is it the world's best sight? No. But it's a great hunting sight for the money.