Ok, here's the short version. Why? Why spend countless dollars on an xbow setup and then restrict yourself to a single aim point device? There's several options out there. As for scopes [my choice] there are Horton, 10 pt, Simmons, Excal, and Tru-Glow. The Horton, [bad stuff, fogs]10 pt [good stuff] Tru-Glow [expensive] all work on the principle of "this is close enough"Rarely will all of the aim points be dead nuts on this type.The Excal V-zone and L-zone will actually allow you to dial in any bow and arrow weight combo to be "spot on" from 10-50 yds. [Excludes Stryker] smart shoppers can get V-zone for $89.00 and L-zone [lit rets] for $119. DUH!!!