It turns a 3.5" 200yd group to a <2" group. The one down-side is increased noise levels, but you don't really notice it from one or two shots in the field. A worthy investment IMO, even if you have to have a smith install one, definitely worth it.
"To preserve liberty, it is essential that the whole body of the people always possess arms, and be taught alike, especially when young, how to use them." -Richard Henry Lee, Virginia delegate to the Continental Congress, initiator of the Declaration of Independence, and member of the first Senate, which passed the Bill of Rights.