Introduction: LOSA Pistol 1

Picture of LOSA Pistol 1

This not your thing? Try my oodammo pistol!

The last picture is the new version with a longer handle. Since it is very easy I didn't bother adding it to the instructable, but here it is anyway.

If anyone has made this in the old colours or has made any mods please post a picture in the comment section!

Step 1: Mag

Picture of Mag

Make this twice. 

Step 2: Barrel

Picture of Barrel

The barrel. I suppose you know what it's for. If you can't read the image notes in the first picture then click on picture 2 and then click picture 1.

Step 3: Trigger

Picture of Trigger

 Here is the trigger.

Step 4: Scope

Picture of Scope

 Optional, but pretty good. If you don't want this then do not add the white rods and the dark grey connector in picture one.

Step 5: Handle

Picture of Handle

I used 1 blue rod to hold this together. I did this because it was the most comfy. However everybody is different so feel free to add as many as you like.

Step 6: Ramrod

Picture of Ramrod

I would advise you to use ONLY a black/clear rod for the ram.
If you can't see through the tape it's 2 dark grey connectors and an black (normally orange) connector.

Step 7: Fascias

Picture of Fascias

 These are optional but they make the gun much stronger. The first two pictures are of the gun with and without the fascias to see which look you prefer. Hopefully the fascias look nicer (that's my opinion). In case you don't understand, the last picture is from the bottom of the gun.

Step 8: Mag Pusher, Mag Loading and Completing the Mag

Picture of Mag Pusher, Mag Loading and Completing the Mag

See the pictures

Step 9: Sniping

Picture of Sniping


You must use rods the same length as the grey rod. 

Someone made an instructable for a straw rocket and they had a downloadable word document containing cut-out fin templates. If you wish to do the same, follow the link.
Credit goes to for the fin sheet


This is a bit embarrassing so I'm just gonna come straight out with it: I measured the L.A.P range completely wrong.
Basically my friend Nigel has this thing he made in A level electronics (he's a bit older than me) which measures the range of his BB guns by firing the pellet through a slot which has a small laser beam in it. The machine calculates the speed of the bullet (the amount of time the beam is disrupted for), and gives a reading of it's potential range in perfect conditions. 
I thought it would be compatible with K'nex guns, so I fired my LAP into the machine and it gave a reading of "60". I was satisfied as I thought that 60ft was a good range. I asked my friend what units the machine measured in, (just to check) and he said it measures in Yards. I was stunned! I worked out that 60 yards is 180ft! So I posted the range of the LAP as 180ft. 
However, I asked him if I could borrow it again for my shotgun (posted the video on YouTube) and he said yes. So I shot the bolt through, and it measured as 225, so that was 675ft! I was very sceptical at this, so I took it outside, and my best range was 204ft. Then the penny dropped! The machine must have measured in FEET, not YARDS! I went to him and told him to check his programming. He was adament that it was measuring in yards, so I showed him my L.R pistol (which I knew cannot shoot the length of my 50ft garden). The machine said 33. That's 100ft! So I told him to sort the machine out. He has now etched the word "feet" next to the digital display, and so tells me that he accepts FULL responsibility for this magor cock up.
And for the record, the LOSA pistol (with a more powerful design than the LAP) shoots 75ft, and about 110 with sniper rods, and this is not at an angle. Add about 15ft for the angled range. 


12mokeef (author)2015-12-31

im really confused at no point does it tell you about how to make the gun fire please help as this gun looks really good.

Revoloutionizer (author)2013-06-11

I just built this, and I found that it was very unstable and wobbly. I've been making models for a long time, and I'm sure I made this correctly, but is it supposed to be very unstable?

Lowney (author)Revoloutionizer2013-09-03

Hey man, never got an update for this comment for some reason...

Hmm, not really sure, it's quite a sturdy design because of the side panels. I would recommend an oodammo gun these days, there's a lot floating a round but the best one is probably KillerK's dunkillmezak (I hope I got that right), or any of the guns that that gun took elements from! And of course turrets such as the TR8, TR18 and TR36 are the best for auto-loading guns, but they cost more pieces!

But back to the topic, this was posted a few years ago so I can't really specifically remember exactly how the gun felt, but I think it was pretty sturdy. What specifically is "wobbly" about it? The mag? The barrel?

The Knexer (author)2013-02-17

2,000th veiw :3 1,999 veiws with hope of good ratings :3

Element Force (author)2012-05-30

thats awsome but how many yellow connector on the gun because i dont have many of them

~KnexBuild~ (author)2011-12-01

Does this jam?

Lowney (author)~KnexBuild~2011-12-01

Nope, and it says so on the picture. If you're good at building from pictures take a look at my other gun like this: it's the same kind of thing but with a better trigger and a removable mag

~KnexBuild~ (author)Lowney2011-12-04

I looked at your carbine and it looked awesome.

PotatoCoffee (author)2011-12-02


rlaxrlax (author)2011-06-08

Hey lowney i extended the mag to hold over 100 bullets it works great!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Lowney (author)rlaxrlax2011-06-08

awesome! Pictures?

jammy5 (author)2011-04-14


Lowney (author)jammy52011-04-16

Haha, actually this is relatively outdated now, check out my new assault rifle preview ;) And LOSA stands for "Lowney's official side arm".

Lowney (author)2010-11-20

True bolt action is where there are 2 chambers, not 1 like on this gun. Basically there is one chamber that the bullets load into, and a firing pin pushes the loaded rod into a separate space, away from the other bullets. This is where it gets fired by another firing pin. They have greater range than most other guns

Lowney (author)2010-11-11

it used to be "Lowney's Official Side arm" but I kinda moved away from this weapon now in favour of LOSA pistol 2, which was a true bolt action.

Lowney (author)2009-10-25


morgan1210 (author)Lowney2010-02-17


Lowney (author)morgan12102010-02-17


TheDunkis (author)2009-10-10

Decent but I'd still go for a BR. These kinds of mag guns are becoming obsolete with shells, bolt action, and turrets increasing the range on repeaters.

Lowney (author)TheDunkis2009-10-11

 What is a shell gun?

TheDunkis (author)Lowney2009-10-11

I'm sure you've seen one. The most common method of "shelling" ammo is putting silver spacers around them. At first it was just for looks but because the sides of the shells are pushing against each other and the insides are smooth the ammo is unaffected by mag friction. The only reason they aren't as popular is because they take up more space and people aren't smart enough to invent a shell catching device.

DJ Radio (author)TheDunkis2009-11-11

Put a paper bag over the area where the shells eject.  I saw this trick on a crime drama, where someone taped a paper bag on to a MAC 11.

TheDunkis (author)DJ Radio2009-11-11

Don't tell me that I already said that others didn't know how. I'm sure you could also build a small K'nex box to contain them in.

DJ Radio (author)TheDunkis2009-11-11

I could, but taping a paper bag over the ejection port is a whole lot easier.

Hiyadudez (author)DJ Radio2009-12-15

But less innotive.

DJ Radio (author)Hiyadudez2009-12-15

Does it look like I care about how innovative it is?

Lowney (author)TheDunkis2009-10-11

 Oh right, is that where the ammo is a rod within some spacers and the spacers get left behind? Thanks. Oh and by the way I have a concept in the making of a mag-fed slingshot with a loading time of under 5 seconds (that includes cocking it!) and no joke! Hopefully that will be more of a match for the BR8 or the other mag guns!

TheDunkis (author)Lowney2009-10-11

I've had a very simple idea for quite awhile. Try this out if you want. Over the magazine area is a roof. Under the room but over the magazine are pieces that slide along inside. They'll be forced over the magazine when unloaded. When you pull back the rubberbands you'll push these parts back until it unblocks the magazine and a bullet will load. This way you'll only need to have one manual action of cocking. Another two idea on making it a better slingshot is to make it at bullpup and to give it crossbow arms. As long as you make the magazine able to accept rifled rods you should have one of the best guns possible.

Lowney (author)TheDunkis2009-10-11

 Well your idea was a little confusing, perhaps you could do a sketch? 
With my drawing the whole cocking and loading is all done in one swift movement, but at the moment I'm trying to build the trigger mech, which is proving very difficult! Originally it was a ratchet, but this didn't work. I'm going for a mech that releases the band, which in turn pushes the bullet forward. However it won't be a rail gun, as sipriani ammo is pretty much impossible to invent a mag for. I haven't started the mag yet, as my 2 priorities are the trigger and the structural strength of it. I was thinking of crossbow arms that fold away when not in use, but the the locks for it will have to be very strong to hold all that power!
I also may get some photos of my friend's machine from the last step of this 'ible. 

knex_mepalm (author)Lowney2009-10-12

I found a cool way to eject the spacers, its like  a switch on the side, you twist it and the spacers come out. Its kinda relistic, but never heard of the shell idea coming popular since 0 Bc

Lowney (author)knex_mepalm2009-10-12

Cool. Pictures? Or is it just a concept? 

knex_mepalm (author)Lowney2009-10-13

Ran out of batteries because I was taking fotos for my new gun. Besides, its very complicated, Uhh my gun with the shell is like 6 layers, and really hard to take apart. The ejection works by twisting like lots on snowflakes and red connetors inside the gun and then it moves a little rubbernad and rod bit that pushes out the shell, but i modded it a bit more, so you can store it in a container or shoot the shell out.

Lowney (author)knex_mepalm2009-10-13

 I have now made some drawings for the next generation of: Lowney's Arsenal!
The are:
Mag fed slingshot
Internal ram with magazine battle rifle

knex_mepalm (author)Lowney2009-10-13

Where are drawings? I might post a shogun, a small one.

TheDunkis (author)Lowney2009-10-11

OK imagine a barrel with a typical magazine. There is a piece in the barrel that blocks the magazine from loading. However, when you push this back (like with the sling bangs) the bullets load normally. When fired, the pieces would move back over the magazine to prevent another bullet from loading until you return the sling back.

travw (author)TheDunkis2009-10-13

I like it! But it may prove difficult to get the blocking part back in time...

KnexFreek (author)TheDunkis2009-10-12

 my NEWrepeating crossbow (not my other one )is a *push trigger swift motion 1 second pull time and has a handle like the real one, all you do is push foward and pull back
u can find the gun on my slideshow called some of my new guns

knex_mepalm (author)KnexFreek2009-10-13

My new drag drop pistol, the mag is relesed like real life , so you turn a piece and the mag drops out!

KnexFreek (author)knex_mepalm2009-10-13

 cool how does it work?

Lowney (author)TheDunkis2009-10-11

 oic. I like my idea though, do you think that you will try and make yours though?

A gun that uses shells.

Lowney (author)TheDunkis2009-11-23

I'm posting my sniper soon, but once that's done I'm going to begin (my first) replica of a sci-fi turret rifle! Shoots oodammo

An Villain (author)TheDunkis2009-11-14

i would use this over a BR because BR rifles have a large turret for a medium capacity magazine, and are very heavy, they also take a lot of pieces, i do not like to waste pieces, because why build 1 large, medium-capacity gun when i can build 2 smaller medium-high capacity guns with the same pieces. but i do see your point with the BR  and shell series having a larger range because of less friction and such.

TheDunkis (author)An Villain2009-11-15

If you use a normal rod magazine gun then at least go for one that uses connectors instead. They won't interlock so they should get better ranges as well and are overall a lot more reliable.

An Villain (author)TheDunkis2009-11-15

yes, but the largest connector you can fire is an orange/brown connector and those tend to stick on the end of the firing pin a little bit.

TheDunkis (author)An Villain2009-11-15

Uh check my assault rifle topic.

Lowney (author)TheDunkis2009-10-10

 Oh and also how does a bolt action mag fed gun differ to this, and I wan't aware of any shell guns: are they basically cannons (like I_am_Canadian's)?

DJ Radio (author)Lowney2009-10-10

Bolt actions are guns that pull back, then push forward with the bolt.  This allows for no mag pressure on the loaded round, thus it will be equal to a single shot's power.  See my AR-4 v3 for a better understanding.

Lowney (author)DJ Radio2009-10-11

 Wait, so is it where it is loaded using gravity not elastics? A bit like Red Impact (without the 'pump')?

TheDunkis (author)Lowney2009-10-11

No the ammo loads into a different chamber and then is pushed forward into the real barrel by a pin connected to the bolt handle. Because the ammo is pushed out of the magazine there is no mag friction.

About This Instructable




Bio: I make instructables. I also have a YouTube channel at!
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