(scoped, with .22 unit) until you do some hunting with one. Many guys "think" that sonic crack is as loud as is an unsuppressed 22 rifle. Wrong, even with the 223 auto being allowed to function normally, and with full charge 223, the rifle is no louder than breaking a large stick over your knee. With such a can on a bolt action, or with the autoloader's bolt locked shut, the sound is about handclap loud. Naturally, with subsonic 22lrs being used in the 22 unit, the sound is reduced to that of a bb gun. With darkness, stealth, thick cover,such a 20 shot 22lr is very deadly from ambush, and if need be, the 223 sp offers real stopping power, and the ability to quietly take deer, guard dogs, sentries, cattle, etc, to 150m on the deer, or the dog, 250m on the man or the cow.