there is no reason to put one on a center fire rifle. number 1...the crack you here is the bullet breaking the speed of sound. nothing made currently could stop that from happening. 2...an animal is not going to jump out of the way of a bullet anyway. the bullet gets there before the sound, think of lightning. you see it then you here it. same idea. but you could reduce the sound on a .22 cal that is under the speed of sound. but why would you? in wv you can own them. but too pricy for me to full with.