It would really depend on if you want to keep your original barrel length to maintain existing accuracy and end up with an overall longer rifle when done. Or if you would rather cut the barrel down to keep the rifle length down when done. From what I have seen a break will add about 4-8 inches to your rifle. I have never had one installed, but my brother in law did for his wife and I think he kind of went for middle of the road and had about 2 inches taken off to keep the overall length down for the finished product.