Sorry to bring this old thread back again, I registered today. Currently I own 4 Avengers one first gen wood stock and three second gen Avenge-X, two .22 and two .25. cal. I considered my two Avenge-X .25 very backyard friendly but I am using them with the Hugget snipe moderator. The key is to tune them so that you don’t go over 990 fps with any of the ammunition you use with any of themI have the original in .25 cal. Can't compare the two. Can kill a raccoon in one shot at 25 yards with a good shot. Had to put a silencer on it. Too load for my backyard. One neighbor actually called the cops on me. They actually laughed when they saw what I was shooting