That's what I have: a Mountmaster. I have it on an air rifle, too: a Crosman 2260 converted to PCP. IIRC, I gave about $75 for it from Bud's. It's not worth $25 in my opinion. And I don't have a problem with cheap Chinese scopes if they work ok. I have a couple of Barskas that I'm 100% satisfied with, considering the price.