Picture of Knetix R-SAR K'nex assault rifle

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The R-SAR (rail-system assault rifle) introduces a new type of firing system: the knetix rail system. This system is rubber-band efficient because there is less friction between the bullet and the barrel, because the bullet does not come into contact with the other ammo and most of the barrel until it is fired. Unlike other guns, this one uses more of a bolt system than a ram system, meaning there is nothing sticking out when you load it. It is very fun to just play around it.

Updates include a safety, more efficient barrel, and a more efficient trigger system

-contained firing pin
-good power (50-60ft with the rubber bands i used; you can use more)
-very original
-sounds SICK when you pull back the bolt
-8 round mag
-very accurate

-bolt will snap if too much pressure is put on it
-uses 3 broken pieces



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Step 1: Outer frames, supports, and trigger *updated*

This step explains how to make the outer frames, the supports, and the trigger.

1. The two outer frames-make these
2. Make these
3. Connect with blue rods to form the stock/handle support (blue rods on handle do not have to be cut but it makes the handle much more comfortable
4. Support-any kind of spacer will work for the middle
5. Make these
6. Connect to form butt
7. Get these
8. Cut rods :(
9. Connect to make trigger
10. Attach supports to one frame, hold onto the other frame
11. Safety
12. Secure tan clip (pic taken after gun was finished)

Step 2: Inner frames and magazine

Picture of Inner frames and magazine
The inner frames of the gun with the magazine walls

1. Inner mag plates-make these
2. magazine walls and ammo guides-build these
3. Attach pieces like this
4. Attach second plate

Step 3: The rail

This is by far the most painful part of the gun to make. I had a lot of new calyces on my fingers when i was finished.

1. The rail
2. Make these pieces
3. Connect first two plates
4. Get these pieces but do no connect them i have just put them in the order they go in
5. Attach pieces
6. Attach third plate
7. Attach final plate (this one is very hard-i had to take it apart to do it)

Step 4: The barrel *updated*

Pretty much a normal barrel

1. The barrel
2. Build this
3. Actual barrel-make this
4. Connect the two
5. Fake barrel parts-make these
6. Put them here
7. Second barrel plate
8. Attach

Step 5: Put them together *updated*

Shows how all the parts fit together

1. Attach magazine to the outer plate
2. Improved placement (read image notes)
3. Front view
4. Broken piece :(
5. New trigger system
6. Different view
7. Attach like this
8. Attach outer plates
9. Attach rail
10. Attach barrel

Step 6: Firing bolt, trigger connection, stabilizer pin, and rubber bands *updated*

The firing bolt is the piece that launches the bullet, the trigger connection connects the rod block to the trigger, and the stabilizer pin keeps the bullets in place within the magazine.

1. Firing pin-make this
2. Put firing pin in so that the rail is between the two orange connectors
3. Secure on each side with 2-way connectors
4. Put 4 blue spacers on each side
5. Attach gray connectors and desired # of rubber bands on each side
6. Cut a red/metallic green rod a little shorter than a yellow rod with an orange connector (you do not need to make the yellow rod with orange connector)
7. Make stabilizer pin with the cut piece
8. Tie 2 rubber bands together like this
9. Loop through connector
10. Put stabilizer pin here
11. Make trigger connection
12. Connect trigger connection to rod block
13. Connect trigger connection to trigger
14. View of both
15. Put bolt rubber bands here
16. Mag ram-you could make it better i ran out of pieces
17. Put rubber band here
18. And here

Step 7: Loading and firing

Picture of Loading and firing
To load:
1. Remove mag ram + get bullet
2. Put desired amount of ammo in mag (up to 8)
3. Put mag ram back in
4. Pull back bolt

*Be sure to pull the trigger all the way through and also be sure to make sure the stabilizer pin is straight before loading.

Step 8: You Are Done!

Picture of You Are Done!
Enjoy the firepower , accuracy and overall awesomeness of the R-SAR

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wieby90911 months ago
Is there a piece count?
knexsim3 years ago
plzzzz can i probably buy on of these out of kex i rly rly wont this gun but i only have a box of 5000 knex parts and i used them up makeing my knex arsinal and this would be perfect for my set but i dont wont to brake them up ill pay anny thing lol
is it possible to short this to like a pistol?
Kinetic (author)  headlessknight4 years ago
Unfortunately no because its length allows the rod to accelerate and shortening it would result in dramatic loss of power.
the pictures and steps are out of order fyi
i fixxed it YAY!!!!!!
complex looking but very nice handle meh... but 4.5*
kevinvos4 years ago
i've made it, it was very difficult but i got it, AWESOME man only when you load it he gets stuck between the two orange peaces ;D
23319954 years ago
BLAH! Can you help out with this? :l Cause the updated one ive noticed is different because of the trigger mechanism and stuffles. Im having a hard time figuring out the trigger, the 2 grey rods at the bottom of the gun and the barrel >__<"
Kinetic (author)  23319954 years ago
Wait, you don't understand the pics, or it isnt working?
An Villain4 years ago
Why isn't this featured? Multiple times. 5*.
Dirtyboyy4 years ago
cool ! 5* and fav.
Kinetic (author)  Dirtyboyy4 years ago
Thanks man I appreciate it!
Sharir17014 years ago
dude i built the gun and the rods just go out of the sides of the magazine, and when i take the ram all the way back, the bullet doesn't load, beacuse its stuck behind the ram even when it's loaded all the way....... PLEASE HELP !!!!!!!!!!
mulletman64 years ago
mine doesn't work properly :(. The "bullet" pops out from under the cut red rod :/
nilsjah1235 years ago
where do you buy knex?
http://cgi.ebay.com/KNEX-BUILDING-TOY-DAYCARE-26000-PLUS-PIECES-HUGE-LOT-/390220757249?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item5adaf83901#ht_787wt_754 There if you need any K'nex here's 26000 peices if you have $900 in spare change
try hoby city or knex.com
topcat1235 years ago
If this gun shrunk in the middle do you think you could fire smaller rods
SonicX 225 years ago
 the instructions are wayyyy difficult to follow.

Kinetic (author)  SonicX 225 years ago
 Well no one else had a problem.
is the ammo SUPPOSED to not even get out of the barrel, or did I do something wrong?
my parents said i could have my knex back tommarrow and i could not get my own gmail
Kinetic (author)  KnexFreek5 years ago
Took away your k'nex? Thats harsh.
i know :(
Wyd they take it away?
to tell the truth, i actually cant remember!! That was awhile back and i forgit why!! It was probably something to do with school....

oops i didn't look at the date on it : )
 no problem!!!
If it involved school, just become a threat to the stability of your house so they won't take it away. That's what I did. Enough types and sizes of tools to take apart a 747, minus the blow torch.
Yeah. I could dismantle anything in my house. Easily.
Yeah... Bad idea for anyone to piss em off; I have about a hundred pounds of wrenches and more pointy tools lying around in my room. I count the D-TAB as a tool.
What? I use it as a shotgun seeing as I don't have the pieces to make the turrets on hand.
why can't you get your own gmail? ill set up an accy for you on gmail, just give me the username you want and ill make it for you. also gonna need your name for accounting purposes.
coulds u do that for me????? thankyou sooooooooooooooo much idk u can make a username just use the word kevin and tennis thankyou sooooooo much ps respond to this in the morning cause i have to go to bed my parents are strict tonight srry... And thanks again . kevin
i messaged you with the link to make an account for it; just use that.
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