you can try to contact the person who sold you. He probably ripped you
Because these low mag things shouldn't have adjustable focus..
If you want the military look then you might have to spend a lot more to get one that's actually good. The replicas tend to be crap. Maybe if you are lucky you get a good one, but chances..
I use sun optics which can be mounted on real steel guns (like .22), not the best optics, but for airsoft it's really good and cheap..But most of their stuff doesn't look cool enough lol..I use a shorty forty 2-6x40mm, although I set it at 3x the entire time. still cheaper than getting out and buying a decent "cool" looking replicas. They are usually sub 150 dollars...