1. KillerK's new ammo magazine. This magazine allows lot of ammo in a small space, and was inspired by the Peacemaker Carbine from Bulletstorm. It also looks awesome.
2. A variant on Luis, 'pinch' mech. This one utilises 2 pincers instead of one this means more power and a horizontal mag. It is operated by pushing the mag pusher.
3. My best mech so far. This was inspired by this gun, made of Lego. The motor pulls the ammo up the mag, and out of the top where it can escape. The has the capability of producing the most powerful and controllable Automatic Knex weapon ever, but I don't have the parts :(
To make the images clearer, Oblivitus has darkened them in the comments below. (I could not save 2 as pictures, so its easier to do this.)