A rear peep, I use a Williams FP with the aperture removed, and a Williams firesight bead, is very fast, and accurate, and better then a standard sight setup in lower light conditions, It cannot compare to a scope in low light, and it will not identify or compare antlers as good as a scope. That said, Ive taken a very large pile of deer with mine out to about 150 yds. Its not perfect, but nothing is.