Introduction: REMPAR-2 Instructions (REmovable Mag Pump-Action Rifle Mark-2)

hey guys !!!

first of all, i'd like to say that in about a week's time since i posted the slideshow and video, i got nothing but positive reviews,most of which were even "beyond positive", if you know what i mean... anyway, thanks to everyone that inspired me to post an 'ible for this great weapon of mine. here is the thing you were all waiting for, so get building (you won't regret it).

so if you haven't seen it yet, this is my pump-action rifle that has a removable magazine, something i've never seen before on a pump-action (therefore, the reason i started making this gun in the first place). according to oblivitus, he counted the number of shots and the number of seconds passing on my vid, and found that it shot a little over 3 rounds per sec (AWESOOOME !!!!). also, i got it to shoot 83 feet. it's dead accurate too. all these things and more are explained on the vid, so check it out (link at the bottom).

mark-1 stats:
83 feet range with 3 #28 bands
extremely accurate
removable magazine
10 round magazine
doesn't jam
easy to pump
7 layers
weighs about 1.7 kg/3.75 pounds
100% reliable, innovative true trigger
handle comforts/ supports/ whatever-s
removable (and therefore switchable) cheek rest with eye protector
plastic sights, no scope
dense and heavy stock to balance the weight on the front
strong ram, trigger, barrel. enables to put A LOT of band power. i use 3 #28 bands and it's still amazingly easy to pump
really easy to pump and really easy to pull the trigger
short pump/ram pull
you can easily fix a miss-pump

mods in mark-2:
slightly easier to pump
you can now swap between pumps (handle, horizontal, vertical, etc.). i can do so in a little less than a minute
gun's structure a little stronger
fixed a few things in the pump body that made it quite uncomfortable (in mark-1)
strengthened ram for more band pressure
added safety
added wheels where one of the bands goes to prevent it from often ripping
a few other minor things were modded for the better

DON'T FORGET TO SUBSCRIBE !!! it only takes a second

Be sure to check out the video and the slideshow as well.

Step 1: Front Portion

Picture of Front Portion

so let's get building ! this is the front portion and the bottom of the barrel as well. rather easy step. read image notes.

Step 2: Pump Body

Picture of Pump Body

this is another simple step, not too much work in it. read image notes.

Step 3: Stock & Main Body

Picture of Stock & Main Body

this step is the tricky part. it is quite long, but fairly simple. read image notes.

Step 4: Assembly of Inner Parts

Picture of Assembly of Inner Parts

in this step we will put together all of the parts we have built so far. this step is rather easy. read image notes.

Step 5: Outter Shell & Band Placement

Picture of Outter Shell & Band Placement

this step is easy. read image notes.

NOTE: i wanted to save on pieces for this part, so i used blue rods instead of 5-way and 8-way connectors with a bunch of tiny green rods on them. if you want, you can make it with connectors and tiny green rods instead of blue rods.

Step 6: Magazine & Attachments

Picture of Magazine & Attachments

in this step you will build the magazine, and see all of the attachments that the gun has (hopefully the number will grow with time).
surprisingly, READ IMAGE NOTES.


ShadowBorne73 (author)2017-08-21

Really an incredible project. However, I'm having a bit of trouble with the last bit of step 2 for the pump itself. Is there anywhere I can find a little more detailed instructions for that part?

thedwarmastermind (author)2013-09-02

is there a parts list

Benjamin Grover (author)2013-07-29

Hi, here is my version of your REMPAR, this is one of the best guns I have built in Knex. It is powerful easy to pump and very innovative. Finished building it yesterday and the highest range so far is about 75 ft, which is good if you think that it is pump action and really easy to pull back. I highly recommend to anyone who has the parts to build this gun it is a beast!!

Thank you so much for your comment! It really is just that that drives me to make these guns, and although I haven't posted in a very long while, I have a couple of guns planned that I am already working on, no spoilers, but one of them is a lever action and it's something I've been working on for over a year now (on and off, granted). Thank you for the awesome pic and fantastic words, I am ever so grateful to everyone who has ever said such things to me... I hope you stay tuned for a while, you have some awesome guns headed your way from me, and one of them is to do with this gun, nothing more I can say at this point. I absolutely agree with everything you said and I remember how much fun it was, specs aside, just to play around with this gun for the fun of it... :D Thank you very much, again, for the motivation, and good day to you, fine sir!

Man, hes making me want to build it. XD

Vanseith (author)2013-02-26

Part list please!!!!!!!!!!!!!!!!!!

Sharir1701 (author)Vanseith2013-03-06

Please don't go about asking people for parts lists on their guns. I won't explain why just because I'm too lazy to do that at this time, but you shouldn't do that if you do not wish to annoy people.

jackson9882 (author)2012-12-24

it looks cool, when I have enough parts I would build it someday.

Sharir1701 (author)jackson98822012-12-24

thanks! good luck to you in that same day.

The Knexer (author)2012-09-07

Hey are there any special parts on this i.e blue clips and if there are nblue clips can teh be subbed? plz respond fast cuz i wanna build

Sharir1701 (author)The Knexer2012-09-08

yes, there are a few blue clips, most can be subbed, but i know of at least 3 that can't be subbed. also, i don't know what other "special parts" you are talking about, but why do you need me to go through my entire 'ible looking for them for you, when you can do the same. the 3 required blue clips, anyway, are one on the trigger block, and two on the pump body, on the "lower" top barrel part. if they are not there, the pump gets stuck on the top of the magazine. if they are longer, like 1 slot connectors, the pump can't be taken all the way back and therefor the gun won't work.

The Knexer (author)Sharir17012012-09-08

Ok thx lol i rly wanna build this but i dont have like any special parts (hinges, ball joints/sockets,etc lol but thx for replying

Sharir1701 (author)The Knexer2012-09-08

oh well then that's really limiting you on what you can build... i would heartily advise you buy some of those parts.

The Knexer (author)Sharir17012012-09-09

Yeah i just made an order on for like every special part lol

Sharir1701 (author)The Knexer2012-09-09

ok that's good, but just for future reference, and are basically the same site, sell the same parts in the same format and everything but everything is a bit cheaper on knexusergroup, so when ordering amounts of pieces, knexusergroup saves you at least 5-10 dollars in total. also, ebay is a lot cheaper than both. if you find someone selling a bulk amount of knex, it'll usually be very cheap and a lot of all types of parts. but i would rather buy my pieces on an arranged pick-my-own-parts site like or just thought you might like to know.

on a similar note, what parts did you order (and roughly their quantities)?

The Knexer (author)Sharir17012012-09-09

Thx for everything oh btw i actually havent orderd it yet i just ment i got it picked out im still deciding the pices i mainly ordered special pices like hinges, ball sockets/joints, tan clips, blue clip, y clips, flexi rods, more rods, gears, chain, and connecters, and a few spacers. thats about all but thx i might comapr it to knexusergroup if i get it picked ojut there. Thx for the information!

Sharir1701 (author)The Knexer2012-09-09

k sounds good, but if you're only doing guns (as in not ball machines and/or roller coasters), chains won't be useful. also, i remember making a big mistake on my first couple of orders where i bought a lot of everything but a lot of green rods (tiny ones), but far from enough. i had a long time of being frustrated because i had so many free parts, but no green rods, so i couldn't build anything with the parts i had left. anyway, what i'm saying is make sure you get a good amount of green rods. think of a number you think is good, double it, and that's how you know. no joke ! and np, always glad to help.

shmi117 (author)2012-06-11

Alright so does this gun have less pieces than the Knexsayer? If I can build the Knexsayer then I can build this. I just don't want to start a project (this gun) then end up having not enough pieces to finish it.

Sharir1701 (author)shmi1172012-06-11

I don't know. I didn't count the pieces of neither. It doesn't use much pieces. A lot of it is hollow and some parts can be built hollow, like the stock

tytiger33 (author)2012-06-08

I never had good luck with internal mag pushers so I used KillerSafeCracker's T.B.A.R. mag. I also use a variation on the standard ammo.
It is a ball joint, green rod, orange connector, half a green rod. I have yet to break this ammo on anything.

Sharir1701 (author)tytiger332012-06-08

yes, the magazines are very similar, good choice. why isn't the internal pusher working for you though? it should be working just fine... also, check out my latest 'ible.

P.S. almost forgot, i like the bullet idea, sounds good.

tytiger33 (author)Sharir17012012-06-09

I never have the right band for the mag and if I do it breaks so fast.
That round is my standerd round for my guns. I use it in your pump action and Seleziona's G36K (I had to mod that gun to use it but it was simple to do).
My "Armour Piercing Round" is a white rod, orange connector, half a green rod.

Sharir1701 (author)tytiger332012-06-09

ok. why would you need that? sounds like it wouldn't get any range or accuracy, and besides, why do you need 2 types of ammo at all? anyhow, i've used the grey con. - green rod - brown con. - cut rod for a long time, but now i'm focusing on bolt-actions and similars (like my TDAC), which are much more efficient (stronger, more accurate, higher range) and use a higher caliber (and therefore better) ammo - a yellow rod. also, the yellow rod can't explode if you shoot it at a hard wall, unlike all multiple part bullets.

tytiger33 (author)Sharir17012012-06-10

For me it is a little better for target practice. And it does penetrate better for me. Especially tougher foams. Besides I like verity. And I don't disagree with you when it comes to the yellow rods in bolt actions and single shot guns.

Sharir1701 (author)tytiger332012-06-10

what ever... rods are the best penetraters, and i never come across a situation where i need to penetrate (insert sex joke here) anything.

Torpe (author)2012-04-02

How many green rods does it use?

Sharir1701 (author)Torpe2012-04-02

honestly, i have no idea. and, dude, most probably anyone that posts a rifle that doesn't have a piece count/estimate probably won't know and/or won't be willing to count them. i'm sorry... i took it apart anyway.

Torpe (author)Sharir17012012-04-04

Ok, I'll make it work, don't worry about it. Thanks anyway.

hegemann44 (author)2012-03-21

where do you break/cut the red and blue rods?

Sharir1701 (author)hegemann442012-03-21

you cut them so that they are long enough to hold 5 layers of knex, but short enough to not protrude out of the sides of the 5 layers. it's not exact science, just cut it at about 5 layers.

The Jamalam (author)2012-03-12

I'd like to know, is all the bulk necessary? it looks good, but by my judgement you could easily make this more compact. I might have a go, actually, judging from the feedback it sounds like it functions well.

Sharir1701 (author)The Jamalam2012-03-13

well, to answer that question i'll explain why the bulk is semi-necessary. you need 3 layers in the middle for friction-less barrel and removable magazine. then you need 2 more layers for the pump body. then you need 2 more layers for the outter walls of the gun to hold everything together. without them, it's just a big bending scramble. so, 3+2+2=7. the gun is 7 layers thick. the reason i said it is semi-necessary is because you can just make a non-removable magazine and a much more friction- full barrel. you can also somehow make the pump body go through a certain point in the barrel, and then have it pushing the pin from the top of the gun, like in kinetic's BPTA (i think that's the name). so, it is not necessary, but then it would be just a different type of gun. so, if you want to keep my design of a gun, i'm pretty sure it is necessary. and it does function very well, yes. did you check out the vid?

TheFoofinator (author)2012-01-10

This gun is fantastic! I love the mechanism, solid and it always pumps the ram back. On thing though is the top part of the barrel (Step 5 Picture 6/7) at the back wiggles a bit, so the firing pin sometimes pops out of the barrel, and jams. I suggest that sqeezing the top with a strong band, so the sanded yellow connector doesn't wiggle.

Overall, great gun and the mag system is one of the most reliabl I've seen.

Sharir1701 (author)TheFoofinator2012-02-08

i found a way to make it wiggle a lot less. i simply put another yellow (grey) rod in the middle slot of the 3-way connector back there, put spacers on it, and strengthen it with 1-way connectors on the outside. if you want, i'll upload a pic. it barely wiggles now, but it didn't bother me before, as i said, so with this reinforcement it works even better.

Sharir1701 (author)TheFoofinator2012-01-10

thanks !!! did you put 1 way connectors on the top back barrel part? they're essential there so that it won't wiggle. it never does for me. this is the first gun i've ever seen that has passed a month and hasn't jammed even ONCE !!! no other gun i've built or seen on this site or KI is this reliable with such great qualities. this is the best gun out there, in my opinion, but then again, it is my gun. of course i love it...

sorry for talking a lot... thanks anyway !!!

TheFoofinator (author)Sharir17012012-01-10

Yes, I put the grey connectors on to squeeze the top part so it doesn't wiggle, but it still does, it may be down to the age/quality of the parts used (some I have are from 1997 0_0) Metallics are newer so the part where the rails on the rods end in less likely to be worn down.

My cousin modified his to have 2 yellow rods on either side of the wiggling piece and his didn't wiggle. I may be able to get pics off him if he comprehends.

I will replace all the parts in that area with metallics (I don't use them often due to the number I have, and see if it makes a difference- they shouldn't be worn down)

That aside, this gun is great. it is a little on the bulky side, but not unmanagable and unavoidable :)

Sharir1701 (author)TheFoofinator2012-01-10

maybe. i used a metallic as you can see.

your cousin built it? does he have an account? rate it and sub, maybe? lol

ok. good luck !

yes it is, but it's mostly hollow, so it's not heavy, and you really do get used to the bulkiness after a week or so and now i don't even notice it at all. yes, it is a must for the gun to be as it is, because otherwise, it would be sooooooo much less cooler and so much more generic and old.

Ben_the_Builder (author)2012-02-07

do you mind if i use your mag as a basis for the next gun I'm trying to build?

nope. feel free to. just, when you make a video or in the description i would like you to give me credit and call the mag SSM (Sharir1701's Standard Magazine). what kind of gun are you building?

matstermind (author)2012-01-13

works great!, if you don't have many cut rod ends for the bullets, found this works just as good

top one is the original

Sharir1701 (author)matstermind2012-01-13

thanks !!! i'll have to check that out... thanks for telling me about it.

Kinetic (author)2012-01-05

Wow I love the improvements you made over the old one with this gun. Good pump actions have always eluded us because the moving parts they require often mean broken pieces, and although there are a few of them in here, I'd say it has to be one of the best pump actions I've seen. Good job.

Sharir1701 (author)Kinetic2012-01-06

thanks !!! the old one being mark-1? i agree. it would be possible to make them without broken parts, though. for instance, the concept oblivitus has put on his concepts page and has also used it on his Z3.

gullible1234567890 (author)2011-12-30

nice one cuz. i might bilt 5/5

thanks man. catch you next friday, john?

daredevil499 (author)2011-12-29

on picture 7 is the cut white rod important?

Sharir1701 (author)daredevil4992011-12-30

yes. it is very important. without it, that part of the barrel won't hold the ram properly.

daredevil499 (author)2011-12-29

in step one do i need to break pieces becuase i don't want to. can i substitute them for something else?

Sharir1701 (author)daredevil4992011-12-29

Yes you can substitute them for blue 3d cons. Please read image notes. They're not there for decoration, after all...

daredevil499 (author)Sharir17012011-12-29

oh sorry I didn't see the one on the bottem

About This Instructable




Bio: I used to build K'nex guns. I'd like to think I've grown to be quite good at it, however, I've lost ... More »
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