0Mr. StealthBest Answer 11 years ago First of all they are too basic and make a Knex gun not look like a real gun. On this site, many of us Knexers don't use the primitive block trigger because it is so "cannibal-ish." There are plenty of guns out there that don't use block triggers and work as good, maybe even better than block triggers. Here is a great list of knex builders without block triggers and other projects. Hope this helps!