I'm somewhat new at this knex stuff, but I built several guns already. I first search what I want to build; for example, if I want to build a "semi-auto pistol" I type in that. Whatever looks cool as the main picture for the instructables is selected in a new tab. Thus, the comments and rating helps me proceed to 'filter' the good stuff and the bad stuff. I like knex, as well as this site. But what's bugging me is that I'm not too sure that people know what 'semi-auto' really is. I don't want to be offensive or anything, but it's really ticking me off. I'm trying to find a gun that's semi-auto, meaning: A type of firearm that fires a single bullet each time the trigger is pulled, automatically ejects the spent cartridge, chambers a fresh cartridge from its magazine, and is immediately ready to fire another shot. So, in knex terms: A gun that fires a single bullet, loads the bullet automatically, with the rod automatically pulled back. I'm sure plenty of people have done this before. Search for semi-automatic knex guns in the search bar. See the title 'REAL semi-auto knex gun!!!!1'. See a really nice gun, think it's awesome and stuff. Then when you finish building it, you use it and you have to pull back the rod manually. It seems that semi-auto on this site is really a gun with a magazine and a rubber band to push the bullets in the mag up or a mag pusher. But in reality, it's not. We need to make up a name or something to show to someone what's the difference between semi-auto and semi-manual. PS: If you know any guns that have a real semi-auto function to it, can you PM me or comment below? Thanks :) PSS: I added the '1' up there as exaggeration.. though some people actually do that, smh..