I was messing with my bro's bow the other day and it got me thinking. What holds the bolt in the rail on a crossbow besides the nock on the string? What I am meaning is, his bow has a Whisker Biscut on it and it holds the arrow in place. I like that feature alot. No worries about your arrow coming off the rest and despite what some say, it doesnt effect accuracy to the point of being noticed.