What are some of your go to budget brands when it comes to optics. I'm working on a range toy that I plan on taking out every once in a while just because it's a fun gun. I'm not planning on doing any serious training with it so I don't want to put several hundreds into an optic that I only plan on using a handful of times out of the year. I know Holosun, Sig and Vortex make some pretty cheap optics but are there others that I'm missing?