I hung a TLR 7 on my P 99 thinking it would give me a functional barrel weight dampening down muzzle flip and recoil. Well the TLR 7 weighs 1 ounce on my scale. It helps but not much. The TLR - 1 weighs about 4 ounces so it looks like it will do much better. Let you know when I try it out. I have both lights.