My SEP /// SEGV-3 (Shell Ejecting Pistol /// Shell Ejecting Gun Version 3)




About: I used to build K'nex guns. I'd like to think I've grown to be quite good at it, however, I've lost most of my interest in K'nex over my first couple of years in High School, but I do occasionally still come...
This is my 5th 'ible (yay).
This is my SEP or SEGV-3. to whoever has seen my SEGV-2, this is a following version of my SEG series. the SEGV-1 was the first version of the series, and it was very bad, so i didn't even bother posting it, and took it down a day after i ad finished building it. the SEGV-2 was also not that good, but it was at least a true trigger with a handle and a decent mech, so i decided to post it. this gun, the last and best in the SEG series, was made in 2 days, after i took a big break from building shell ejectors. this pistol is truly amazing and i will show the pros and cons below:

easy to use
easy to load
symmetrical (unlike the previous versions of the series)
long range (60-65ft with 6 doubled up bands (12 bands in total))
very sturdy and strong
good shape
never breaks
small, doesn't use a lot of pieces
all broken pieces can be subbed for non-broken pieces, and the non-brokens aren't all that bad
big magazine, can hold 10 round/bullets, can be built bigger
flawless (so far and for me, at least)
comfy handle
(of course) true trigger
strong structure
relatively accurate
and (of course), last bot not least - ejects shells

has broken pieces, though all of them can be subbed for non-broken pieces, as i said before
you need to be careful after shooting all your shots not to shoot at the mag pusher because that's trouble
relatively big and long for a pistol
mag can bend a little at the sides because of no support (can be fixed by adding 2 more support layers on the outside of the mag, i did it a day after i finished uploading pictures lolz)

Demonstration of shooting my SEP / SEGV-3:

How to load my SEP / SEGV-3:

Step 1: Trigger, Ram, and Mag Pusher

1. the trigger
2. the block
3. connect like so
4. put a rod through the 3-way connector of the trigger
5. ram
6. close up of the ram
7. tape and bands
8. "ram bands"
9. mag pusher

Step 2: Handle

1-3 and 5. different views of the handle
4. the middle layer of the handle
6. get these (optional)
7. attach like so (optional)
8. another view

Step 3: Top Rail

1. bottom view
2. left side view
3-6. close-ups, read image notes
7. top view

Step 4: Main Body Walls

1. the two outter walls (identical)
2. the rods sticking out of one of the outter walls
3. the inner walls

Step 5: Assembly and Rubberbands



    • Remix Contest

      Remix Contest
    • Weaving Challenge

      Weaving Challenge
    • Pocket Sized Contest

      Pocket Sized Contest

    34 Discussions

    The Knexer

    6 years ago on Introduction

    Wow! I built this yesterday modified it a little ( For my peice count) And it IS Flawless (Besides the fact that the triggers is pretty low but thats me) because I've only had it once where the shell got stuck in the ejector. 5 Stars!!! (and a favorite) :D

    2 replies
    Sharir1701The Knexer

    Reply 6 years ago on Introduction

    lol i just watched the video and lmao... my voice is so high pitched here and the video itself is so bad XD

    Sharir1701The Knexer

    Reply 6 years ago on Introduction

    wow thanks. you do realize this is one of my lesser guns though, right? i perfected and smallified the shell ejecting mechanism a long time ago, and since have built much better guns. you could argue though that the simplicity suits you, but i like complicated things. anyway, thanks and i hope you keep enjoying it and my other guns.


    that would just be a waste of pieces... why quadruple the amount of pieces used to get no change but looks and a heavier gun? usually rifles are made to accommodate larger mechanisms and still keep the same amount of comfort, with a little bit more stability.


    Reply 7 years ago on Introduction

    Sorry, what I ment to say was '' Why make a bulkier version'' to correct knexinglemon, and agreed with you.


    7 years ago on Introduction

    Not bad but like some people say the trigger could be better. I use a internal mag pusher made out of 2 half-flakes, 3 small green rods, 2 white rods and 4 y connectors and it moves smoothly and never jerks back and forth. The thing i dont like about internal mag pushers is reduced ammo count

    1 reply

    Reply 7 years ago on Introduction

    nonsense... at least in this gun, the internal mag pusher i use doesn't reduce ammo count and it works excellent... never jerks or jams or anything. try picturing it its like an H (capital H) using 5 black rods and 2 5-way connectors.of course it's put into the gun as an H tilted sideways (90 degrees).


    Really nice work man. I love the compact shell ejector system. The trigger could be moved closer to the barrel, but that's me just being nitpicky. Why don't you use an internal mag pusher? The side of the mag is open, it would make it look great!