The Kinetic Rifle V.1
The reason I call it a "semi-repeater" is because while it has a magazine, loading it involves a two-step process of pulling back the rubber band and then pulling the pump. Therefore you don't have to load each individual bullet into the barrel by hand, the pump does that for you, but the band still has to be pulled back manually. The gun was originally intended to have the pump bull back the band as well, but to do so the pullback distance would have to be greater, requiring a larger barrel to house a longer pullback, requiring pieces I just don't have. When I get the pieces I am going to make the pump pull the band back, and I will post that as the V.2.
What I love about this gun is that it takes many concepts and combines them to work in sync with one another. I also like the fact that there is almost no limit to how powerful you can make this gun, since the ratchet can hold an incredible amount of tension.
Overall it is an incredible gun, averaging ~60ft with the 1 band used in the video. Though it isn't the most reasonable choice for a war (it only holds 4 shots in the mag and is huge), it is well on its way to becoming the most efficient knex repeater out there.