Picture of K'nex pistol
A block trigger muzzle-loading K'nex pistol. These are my favorite K'nex guns, both because of ease of use and high power. It even has a sight-ish piece on the side, although I've found it easier just to aim by pointing the gun in the general direction of the target from about chest-height.

By flipping the trigger over to the other side you can make a left-handed version of the gun. You also have to flip the blue and silver rings and the sight.

Modifications and suggestions are welcome. Just make sure to leave a comment!

Note: You need to look at all of the pictures to know exactly what I'm telling you to do. Some steps are rather hard to explain, and are best shown.
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Step 1: Gather the parts

Picture of Gather the parts
Note: Rods are the long, thin pieces and connectors are the pieces they snap into.
Normal colors will be given first, then metallic colors. I used metallic colors where possible when building this particular gun.

For this Instructable you will need:

13 yellow or grey half-circle connectors
2 orange half-circle with knob connectors
2 purple or silver half-circle notched connectors
3 red or dark speckled grey quarter-circle connectors
3 grey one-opening connectors

1 green or black small rod
3 white or silver small rods
2 yellow or dark grey medium rods
3 red or green long rods (note: orange rods are the same size, but they cause too much friction to be used for the pin and do not fit as the side bars. Use of them is inadvisable.)

3 small blue rings
1 large silver ring

2 fat brown rubber bands (#64)
1 long rubber band

Step 2: Begin building the back end of the barrel

Picture of Begin building the back end of the barrel
1. Snap five grey half-circle pieces onto one of the green medium-sized rods. (Diagram I)
2. Snap another green rod onto the other side of the grey half-circles. (Diagram II)
3. Snap four more grey half-circles in between the two green rods. (Diagram III)
DJ Radio5 years ago
Dilong_paradoxus (author)  DJ Radio5 years ago
 >slap back, a little harder, just because I feel like it<
A few months too late man.
Dilong_paradoxus (author)  DJ Radio5 years ago
 Sorry, instructables' message emails aren't working quite like they used to.
I turn the email alerts off lol.  Screw that feature.
>>SLAP<< Oops, umm sorry...
Dilong_paradoxus (author)  DJ Radio5 years ago
 Ah. I need them, because I check email way more than instructables...
rrr674 years ago
what"s the purpose of the 2 1-slot connectors?
Dilong_paradoxus (author)  rrr674 years ago
They keep the front three 3-slot connectors from bunching up. It's optional, but I think it helps friction-wise. If you have bad problems with the shot falling out you can remove those connectors and twist the three-slots slightly to keep the shot in there better.
KnexFreek5 years ago
use a TAN  rod as your ram!!!!!!!!!!!!!!!!!!!!!!!!!!! duhhhhhhhhhhhhhhhh!!!
Dilong_paradoxus (author)  KnexFreek5 years ago
 Why? The green rod should have less friction, and it's shinier. :D
 actually, tan rods have less friction.

dude cmon, u should know this:

gray rod vs black..... hmmm what to choose....

green/red (same thing), vs tan...... hmmmm what to choose....

tans are made of the same stuff as black rods and they are the slickest rod knex makes  because they are coated in a thin coat of acrylic
Dilong_paradoxus (author)  KnexFreek5 years ago
Nevermind, I was thinking of the other tan ones. After some rummaging through my collection I figured out that the right tan ones do have less friction. I also figured out that since I only have one, equipping my K'nex arsenal with it is infeasible.
LOL :) did u see my new guns perchance??

Dilong_paradoxus (author)  KnexFreek5 years ago
Yeah, they look pretty cool!
 Thanks!!  im glad you like them :)

Dilong_paradoxus (author)  KnexFreek5 years ago
The tan ones always seem to get stuck in my guns because of the weird knobbly things on the ends. 
Spycrab5 years ago
i think it looks like  neat gun, just don't have that many rubber bands ^_^"
Dilong_paradoxus (author)  Spycrab5 years ago
 Thanks! I'll work with one to two rubber bands, and actually feels a lot smoother when you use it like that. You just sacrifice a little on range and hitting power.
o.k. then :)
but hmm...i don't have the yellow piece with knob, guess I'll try to find another piece to replace it
Dilong_paradoxus (author)  Spycrab5 years ago
Just use a normal yellow, and stretch a rubber band from that around to the handle. You'll have to fiddle around a lot to get the right tension, but it should work alright.
will try it out =)
Spycrab Spycrab5 years ago
just built it, works pretty nicely!
got a bit of power, and fires without flaws.
the best part is, it never jams like magazine guns :)
Dilong_paradoxus (author)  Spycrab5 years ago

Yeah, but the end of the firing pin falls off sometimes. :D
u used a roller coaster kit?
Dilong_paradoxus (author)  Blackonyx22345 years ago
Yep, but just for the orange bits. The rest comes from the ISS set, in metallic colors.
Vynash5 years ago
I don't mean to be mean but I would take this down. Sorry
Dilong_paradoxus (author)  Vynash5 years ago
Why? I don't see the point of taking it down.
It's just so basic, I could build it in 3-5 minutes.
Dilong_paradoxus (author)  Vynash5 years ago
Of course. That's the beauty of it! Simple to build, doesn't require a terrible lot of parts, and easy to use.
Sorry but try to build something bigger with a true trigger. I realize you probably don't have thousands of pieces, but please try again :-)
Dilong_paradoxus (author)  Vynash5 years ago
I still have yet to figure out exactly how the whole true trigger thing works...that's still a couple versions ahead. When I figure it out I'll make sure to tell you! I will. Don't worry!
Okay cool!
DrWeird1175 years ago
This is really good, just like most of the other guns like this here. But you have to take this down if you want to be received well here. Sadly, it's true.
Dilong_paradoxus (author)  DrWeird1175 years ago
Thanks! I don't particularly care If this isn't received well. That's their problem. This is a good gun, like you said...
That's the spirit!
manu115 years ago