Yeah, they're fixed power.
I have a cabela's Covenant 7 5-35x56 FFP that is a lot of scope for the money. It's on a target rimfire, but the glass and fov are good with only slight chromatic aberrations at the highest magnifications.
I'm seriously considering getting the 3-21x50 FFP version for one of my hunting rifles. You can get them new for $400 or look on ebay and find them occasionally. Usually in the $250 range for used on there.
They're mil/mil with a pretty good reticle and come in both FFP and SFP. I would stay away from the 5-35x56 SFP. It uses the same reticle as the 3-21 SFP so it's only accurate at 21x and there is no detent to tell you where that is