Introduction: AP4 K`nex Gun by Oblivitus

Picture of AP4 K`nex Gun by Oblivitus

K'nex Gun Name: AP4 (Assault Pistol 4)

Description: This is a small, sturdy k'nex gun that works flawlessly. This instructable will show you how to make the AP3, the AP4 mods are on step 7.

Influences: I designed the entire gun except for the back handle, which I took from Killerk's Magnum and then I modified it.

Power: 3/10
Accuracy: 6/10
Rate of Fire: 7/10 (cock and fire)

Size: 7"(inches)x11"(inches)
Capacity: 9 rounds (6 when attaching pre-loaded clip)

Features: AP1:Realistic Trigger, AP2:Detachable Clip, AP3:"Iron" Sights, AP4:Safety

1: AP4
2: AP3
3: AP2
4: AP1

You can build the AP1, 2, 3, or 4 depending on how many parts you wish to use. NOTE: THE AP4 PICTURES ARE ON STEP 7.

Step 1: Pictures of the Magazine

Picture of Pictures of the Magazine

1: Right
2: Front
3: Feeder Detached
4: Ammo

This magazine holds 9 rounds. (6 when detached, see step 6)

Step 2: Pictures of the Back Handle

Picture of Pictures of the Back Handle

1: Left

This is the only part of the gun I took from someone else.

Step 3: Pictures of the Barrel

Picture of Pictures of the Barrel

1: Front Of The AP2
2: The Support Rail With Iron Sights

BTW: Use duct tape at the back of the firing rod.

Step 4: Pictures of the Trigger

Picture of Pictures of the Trigger

1: The Trigger

You will need to use some sort of strong glue at the top of the trigger piece connecting the orange 180 degree connector with the tiny black, special connector.

Step 5: Loading/Cocking/Firing

Picture of Loading/Cocking/Firing

1: Pull the elastics off of the clip feeder.
2: Pull out the clip feeder and fill the clip with gray one slot, one k`nex rod hole, connectors.
3: Replace the feeder and then the elastic bands.
4: Hold on to the top of the clip with thumb pressed on the second blue rod from the front, on the top supports.
5: Pull back the firing rod pull.
6: Press the trigger while gripping the clip with other hand.

Remember that if you fire while there are no rounds remaining in the barrel, the top of the feeder will break because it will get hit with the firing rod.

Step 6: The Detachable Mag

Picture of The Detachable Mag

1: Add a few layers of scotch tape to a short (3rd smallest size) blue connector.
2: Put in the side of the mag near its top.
3: Fill mag with 6 rounds
4/5: Pop the back, then the front of the empty mag out of the gun.
6/7: Pop the back, then the front of the full mag into the gun.
8: Pull taped rod out.

You are now fully reloaded!

Step 7: The AP4

Picture of The AP4

1: Left
2: Right
3: Top
4: Bottom
5: Left Side Of Mag
6: Front Side Of Mag
7: Safety
8: Trigger

Step 8: Need Help?

Picture of Need Help?

Message me if you get confused!


Lightning Thunder (author)2010-11-12


joshualater (author)2010-02-25

 there's an ap2 by HK.RBG.armorer 

KnexFreek (author)2010-01-17

range ? (i dont care how many bands) 

Oblivitus (author)KnexFreek2010-01-17

I believe that it got 25 feet. I took it apart a long time ago.

KnexFreek (author)KnexFreek2010-01-17

 also 5 stars

I3uckwheat (author)2008-08-28

ur hurting ur own rating not good handle instructions either 1/2 star off

Oblivitus (author)I3uckwheat2008-08-28

It's pretty simple, it's KILLERK's handle, and plus you can make the bottom however you like.

Trauts (author)Oblivitus2008-08-29

I hate that when people can only make it from what you have presented to them, and they can't just make something on their own if they can't see the right pieces for something simple like... "I can't make the barrel because at the front I can't see if it's a yellow or an orange connector."

Oblivitus (author)Trauts2008-08-29

Yep, every gun I make from this site looks like a mod of the original before I even start messing with it, lol.

knex_mepalm (author)Oblivitus2009-10-11

I modded the handle for the TBAP and the trigger, and it looks different, the rest looks the same, maybe other ppls mods are internal...

I3uckwheat (author)Trauts2008-08-29

i can do somithing els i just was in a bad mood

Oblivitus (author)I3uckwheat2008-08-30

The irony.

Trauts (author)I3uckwheat2008-08-29


knex_mepalm (author)2009-10-11

Have I seen this before. Seems different, anyway it looks like an '' ,, ,, '' ,, ,, '' ,, ,, '' ,, ,, ''MP7'' ,, ,, '' ,, ,, '' ,, ,, '' ,, ,, ''

ILIKEPIE333 (author)2008-09-10

why is the bottom of the mag different?

Oblivitus (author)ILIKEPIE3332008-09-10

Will you be building this?

ILIKEPIE333 (author)Oblivitus2009-09-21

still haven't built it

Oblivitus (author)ILIKEPIE3332009-09-22

Lol, I don't care anymore, the AP4 is crap, I only kept this instructable to prove that I was the first one to make a pin pull magazine and safety.

Oblivitus (author)ILIKEPIE3332008-09-10

I made it thicker to make the outside pieces lock in place instead of only the middle pieces being connected, allowing for more flexibility, the way it was in the AP3.

Oblivitus (author)2008-07-25

This gun, my moddified version of Jollex's DD-27 v2.1 is soon to come!

happybirthday (author)Oblivitus2009-03-14

Hwy Oblivitus, What is the best gun on this site that uses moderate peices? I need to build one for a war.

An Villain (author)happybirthday2009-07-04

oodassault pistol by the jamalam, has everything, true trigger, looks, feel, mag, compact, sturdy, and lightweight.

An Villain (author)An Villain2009-07-19

sorry, the dunkis.

Oblivitus (author)happybirthday2009-03-18

Build my Beast Pistol or Ultra Pistol if you can't.

happybirthday (author)Oblivitus2009-03-18


I forgot to mention it has to have a really good range

Storm950 (author)Oblivitus2008-07-26

True trig?

Oblivitus (author)Storm9502008-10-19

My AP5 is coming soon!

Storm950 (author)Oblivitus2008-10-20


Oblivitus (author)Storm9502008-10-20

It has better sights, the safety is easier to pull on, it is more powerful, it has a new chamber design that keeps ammunition from falling out of the barrel or into it to far, extra stabilization has been added at the back for the firing rod, the firing rod can now be cocked faster, and there are a couple of other small improvements.

Oompa-Loompa (author)Oblivitus2008-11-21

when's it a-coming along?

Oblivitus (author)Oompa-Loompa2008-11-22

Probably after the Beast Pistol.

Oompa-Loompa (author)Oblivitus2008-11-22


Oblivitus (author)Oompa-Loompa2008-11-22

Get used to that name, lol.

Storm950 (author)Oblivitus2008-10-20

Sounds good!

Oblivitus (author)Storm9502008-07-28

I just finished my instructable on it, check it out.

Oblivitus (author)Storm9502008-07-26

Yep. It's in the red box. I covered the rest of the mechanism up to make it look more realistic.

An Villain (author)2009-07-04

looks a bit like a killerk magnum.

Oblivitus (author)An Villain2009-07-05

That' probably because it has the same handle. This was my first instructable by the way, the gun isn't very powerful at all, but I thought that it was at the time when I had nothing to compare it to.

An Villain (author)Oblivitus2009-07-05

yeah, the handle and the yellow bits on top look killerk-ish.

dracoshadex (author)2009-04-17

are you blind or something these pics are fine

snowborden1 (author)2008-09-25

there should be better pics. because those don't have a side view!

Oblivitus (author)2008-08-28

Lol, are you ever going to stop hassling me? If you can't figure anything out then you need more experience with k'nex guns, then come back and build this.

I3uckwheat (author)Oblivitus2008-08-29

no jk lol ya i just wanted u to know that u could of done a better job on it and i have a good experiences with knex guns

Oblivitus (author)I3uckwheat2008-08-29

But you voted me down. -_-

I3uckwheat (author)Oblivitus2008-08-29

i will give u a 5 star rating when u get better pics but just becaouse its the week end i will give u a 3 stars

I3uckwheat (author)2008-08-28

woah that is a bad step thats a whole star off

I3uckwheat (author)2008-08-28

make better clip instructions please more angles would be nice for me bad instructions = bad rating right now just on the clip it is a 2 * rating so make better clip instructions if u want a better rating

Oblivitus (author)I3uckwheat2008-08-28

Okay, If you are talking about the AP4 mag pictures then I see what you mean, they are a little hard to follow. I will post one more picture of it sometime.

j-chode! (author)2008-08-21

So will your comment eventually. Muahahahaha.

About This Instructable




Bio: I paint, write music, and used to build knex guns. I have a Bachelor's Degree in Studio Art. - updated 5/7/2014
More by Oblivitus:Z3 Knex Gun (3-Barreled Semi-Auto Pump Action Revolver)Z3 Knex GunZ3 Knex Gun Firing Demonstration
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