I don't even remember where i got mine, maybe wal-mart, but i just got one of the cheap ones that you have to cock the arm and load a target every time, then pull the string to let fly. It was cheap and it works, so i can't complain. I've shot solo over it many times and can pull the string with gun in hand and not affect my shooting at all, or tie the string to my ankle and use my leg to pull it.
Dunno if that helped, but its my .02 anyway.
The life cycle of a hunter... hunt, eat, sleep if there is time, then go hunt again.
Chuck Norris doesn't go hunting, becasue hunting infers the possibility of failure. Rather, Chuck Norris goes killing.