The whole reason that I initially got into air guns was the ability to shoot in my basement in the winter. I bought a Champion metal pellet trap and it seemed to work well, but it clanged loudly. Turns out my Miniature Schnauzer would get freaked out by the clanging which upset my wife which rolled downhill to me. I tried lining it with duct putty, but it was still pretty noisy (and really heavy). I watched some YouTube videos and decided to make one out of a plastic tub filled with rubber mulch. This thing is the balls. Quiet and neat. The only thing I did differently then the two videos I watched was to cut two pieces of sheet metal to the exact size of the interior base. I placed the two layers of sheet metal in the bottom if the tub and packed the rubber mulch on top. I figure that gives me just a little more pellet stopping. I put three layers of cardboard into the top of the cover held on with a couple of bolts with washers and I zip tied the cover on. So I can just put sticky targets over the holes or duct tape and then change out the cardboard when it gets too ragged. Eventually the whole tub can be changed out for less then $4.00. By the way the target in the left is 20 shots from my Condor SS .25 and the one in the right us 20 shots from my Taipan Veteran .25 both with the JSB 25.3 gr pellets.