Things I liked: Well made, light weight rings. Height is med/high. A 44mm objective scope (Hawke SF) fit my Air Arms 510 w/room to spare.
What others should know: Remember to not max out your scope's adjustment when sighting in a zero at long range. Use shim(s) on the rear scope ring bottom. Your point of impact may wander otherwise.
Things I liked: Surprisingly good gun. Actually has accuracy and even better range than a $350 AEG I just bought.
Things I would have changed: Stock is a little long for my shorter arms.
What others should know: Very effective hop-up. A bit heavy, but this is a replica of the all-steel Thompson. Pyramyd-Please stock parts that wear, so I don't have to have this gun down for long.