I was mistaken, it is a 4x20. Sportsmans guide has it and I have found it on other sights as well. It is made specifically for bp rifles. The main reason I'm interested is because it is clearance priced. $30 for the thing. On other sights I found it to be $90. So if anyone has used it let me know, deal or dud? And no, I didn't learn a lesson from buying a cheap scope before or I wouldn't be trying to do it again.LOL.