A bit more but I have the Nikon rifle 1000, it was about $329. The 550 is about $270 and has the same features. Really easy to use. Locks on quickly. Has the angle adjustment that bow hunters need and gun hunters want. Only small nit.....I have never been able to sight beyond 900 yards and usually 800 yards but that is irrelant with the bow (or rifle for that matter).