I have a fixed 2.5 Tasco on my 870 and it's worked for me for alot of years. I'm going to order a Simmons 2x32 with the pro diamond reticle later today though because I use the same gun with different barrels for turkey and deer hunting. I don't like having to take a gun zeroed in perfectly for slugs and have to re-sight in for best pattern every spring, then re-sight again in the fall for slugs. The scope mounts are easy to pull off, they are bolted right to where the trigger assembly pins go. I know I could get one quick detatch scope mount for both scopes, but its easy enough to change out. I'm hoping I won't have as much sighting to do every spring and fall.