I'm considering looking for a used FAS 604/new 6004 or a used FWB 65/80 for indoor practice use. I want something quiet which probably rules out a PCP. I currently use a Daisy 747 which fits the bill apart from the poor grip and weight/balance and as a result I don't particularly enjoy shooting it.

The FAS seems to be light with good grips but there may be an issue with seals on a used 604 and I've read of a number of quality control issues with the new 6004.

The FWB could be an option if I can get a good one but whilst the grips are much better than the Daisy I don't know if the weight and balance will be much different.

Any advice would be appreciated.