K'nex 'semi Pump Action' Gun





Introduction: K'nex 'semi Pump Action' Gun

About: Hey there. I won't add too much info here, as it'll show up as one big paragraph.
Hi there. I made this gun today, and wanted to show it. It is a repeater (it shoots), and reloads the bullets from a tubular magazine underneath the barrel. With semi pump action, I mean that you  have to cock the pin manually, but you chamber the bullets via a pump. I had this idea a long time ago (a very bad prototype is on Mahmel's orange board), and decided to do it again.
I hope you like it, and please comment. Help is also appreciated, as it isn't near perfect yet.
It holds 3 bullets (in the video that's coming up soon, I only used 1, as I didn't cut the needed y-connector correctly
Update 1: 
- Cut a y connector in a special way, makes the feeding much smoother (this one was also needed on Bakenbitz's original mech)
- Made the barrel 1 connector longer, and added some sort of hop-up
- Different stock
- Different barrel internals. Bullets don't become stock anymore

- Bakenbitz for his lever action gun. I used the bullet ramp in a modified way, to incorporate the pump.
- Killerk, for the idea of the hop-up (inspired by this add-on on his Z35)

Video of the new update:



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    38 Discussions

    Thanks. I can try the PDW-57, but after I posted instructions for this. I hope to have these finished on Thursday (my shortest schoolday), but I have exams from Friday 'til next week Friday, so I don't know when the PDW'll be finished

    Yeah. I posted the instructions for this one yesterday. Maybe I find some time tomorrow, or already later today, to start the PDW

    Cool, but whats the point of pulling the pin back then pumping it when you could just pull the pin back on a regular gun?

    1 reply

    I am designing something a little similar to this. Except it as a vertical (as in up and down) removable mag, and I'm trying to allow the pump on my gun push the bullet from the mag into a separate chamber as well as pushing the firing rod all at the same time. It's going to be an innovative kind of gun.

    5 replies

    Sounds cool! I had that sorta idea in my head for a tubular mag, but then I realized that with tube mags, the pin pull would be very short. So I made this. Looking forward to see what you come up with

    I'll maybe post them today. I've fixed the barrel and feeding problem, and made a (in my opinion) better stock for it.