This is my most recent gun, the KGBSR. it fires about 50-75ft depending on the bands. it uses a bolt action like firing pin which i have never seen before, to cock the weapon. to make the gun fire, you first pull back the bolt, and then pull the bullet back by the sling of rubber bands. the bullet lock is 2 ball socket connectors which can hold alot of force pulling the bullet out. it also features bullet holders on each side of the gun, which can hold 3 bullets each. i think it kind of looks alot like a barrett .50 cal without the magazine. i hope to keep knexing as much as i can untill i can sell my knex. tell me what you think!