Instructables

Knex Semi automatic Blowback pistol V1 & V2

---------V1------------
Hello, here is my Knex semi-automatic blow back pistol that yes, actually worked! It held 4 rounds and it could shoot very rapidly. The slide pulled back about two inches but slammed forward with power! It shot 35 feet using one rubber band.
---------V2------------
The V2 is the non metallic version. It holds five grey connectors and can shoot 30- 40 feet using two #64 rubberbands. Its slide can pull back three inches before slamming back to fire the bullet. It also has a much better construction build than the V1 but doesn't look as good.


Picture of Knex Semi automatic Blowback pistol V1 & V2
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CODawesome10 months ago
pretty cool mech! but there is no possibility that it can shoot 30-40 feet when it is a semi auto. the pin doesn't move back far enough as a bolt action or a slide action. i've seen the video from RBW and the top part moves back less than 1 inch (approximate). But still, it's a beast idea.
tumidaj1 year ago
It's uncommon! i must try it :)
Blue Mullet (author)  tumidaj1 year ago
Its posted!
You should post both if that's not to much to ask
didexo1 year ago
Looking forward to it....
Blue Mullet (author)  didexo1 year ago
You sure do sound like it! Lol, JK.
Not anymore now that it is out :D
so....................... are you going to post this?
Blue Mullet (author)  TheAwesomestDude1 year ago
UPDATE: THIS WILL BE POSTED IN THREE DAYS!
Like no offense but its about time
Blue Mullet (author)  TheAwesomestDude1 year ago
Like sorry man, Im going to PM everybody the instructions but you. Lol, JK.
You should post both if that's not to much to ask
ROFL sorry I know you're not obligated to post its just annoying when someone shows a great gun says they're gonna post it and then a few months later they do
I'm waiting...*stamps foot impatiently* =D
UPDATE: THIS WILL BE POSTED IN THREE DAYS!
This is good news. =D
Yeah.....I've already failed twice trying to make this..... Internal failure......
Huh, to bad. I have never made a blow-back gun, so this would be fun to learn.
What is a blow-back gun?
A blow-back gun is this: When the trigger is pulled the slide (the part of the top of every pistol that slides back to re-cock the firing pin/hammer) slides back and flies forward to hit the bullet. Thus, it is called a blow-back because the slide blows back when the trigger is pulled, see?
Ah, I see now.... That's kinda how my machine gun worked to, accept a motor pulled back the slide each time.
Ah, I see. Glad you understand.
Yep, I have experience making stuff but don't know what it is called. I'll learn the lingo eventually.
No problem.
.......
...?
hunter9991 year ago
Coooooool
Blue Mullet (author)  hunter9991 year ago
Thanks man!
JonnyBGood1 year ago
So, I was thinking about trying to build this, but where is the mag for this gun? Is it built into the front section? I still don't know how this works but I figure if I build what I see here I might figure something out.
Blue Mullet (author)  JonnyBGood1 year ago
UPDATE: THIS WILL BE POSTED IN THREE DAYS!
jollex1 year ago
Looks really cool. If it works how I think it does, I tried making a gun like this a couple years back but never got it to work.
Thanks man! I'll be posting this very soon.
freaking post it already!!!!!!!!!!!!!!!!!!!!!!!!!
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1,000 x 10 ^ 1,000,000 Ha, beat that!
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00000000000000000000000000000000000000000000000000000000000000000^2^2^26^1.5^4^78^1000000000000000 You can't touch dis
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pedo.jpg460.jpg459 - Copy.jpg
X )
Define soon....
XD
Good, good.
Knex.X1 year ago
I dare you, I double dare you not posting this!
Dude, what is wrong with you...
what? I probably typed my statement wrong. I want him to post it. I only say I dare him not posting this.
=D
I would love to take this and make a Walther PPK/S out of it. Yeah, I just watched the James Bond movie "Skyfall" and I now have a new appreciation for Walther firearms.
JonnyBGood1 year ago
Please post! I will drop any project to build this!
didexo1 year ago
You should really post it......
CODawesome1 year ago
post it. btw, is the mech similar to my semi auto vector (repeatable)
Blue Mullet (author)  CODawesome1 year ago
Nobody knows how this pistol works.
post it
Is it like mine (pull the trigger, ram goes forward. Let go of the trigger, and the trigger goes back to its place, which pulls the ram rod back. Then repeat it over again)?
I would really like it if you would post this.
same here
i would like to see this posted if its possible