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Bullpup pump action rifle (working)
a working pump action rifle in bullpup configuration
About this creation
this is a pump action rifle in bullpup configuration. for those of you who dont know what bullpup is, it is when you have the magazine, reciever and chamber behind the handle. bullpup rifles were introduced because (obviously) the design makes the barrel longer in proportion to the overall length of the gun. this makes the gun more accurate, and has the potential to make the gun more powerful with the same calibre bullet (the gas from the explosion is focused on pushing the bullet forward for longer if you have a longer barrel).

the most famous and successful bullpup rifle is the Steyr AUG. other bullpup rifles include the Tavor, FN P2000, FAMAS, and other guns. (the P90 is one, but it is a sub-machine gun, not a rifle)

if all this text is too much for you, you can see a video here which explains it much better.

this gun was originally going to be a FAMAS, but halfway through building it i decided that a pump action would work better that the cocking handle that the FAMAS has. also, building a full scale FAMAS would mean that i would have run put of black pieces - the carrying handle would just have taken too many pieces. it is possible to see the similarities though.

the gun takes a 10 brick magazine (1x4 pieces), any more and the mechanism would jam under the stress of the magazine's rubber band. the bricks are inserted in the magazine in alternating rotations - you put the first one in studs up, then the next one upside-down, then the next upright, and so on. this stops the bricks sticking to each other.

when you pump the shotgun, a rubber band is pulled back, streching through the barrel, like a crossbow would. when the pump gets near the back, it hits a lever which pushes a brick out of the (inserted) magazine, forward and up to be locked in the barrel, in front of the rubber band. this means that when the trigger is pulled, the bullet is released, and the band can push the brick down the barrel.

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i have just taken the gun apart, but when i did i took a photo of the insides - for those of you who want to figure out how it works, this might help:










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pics:
the left side









the right side









the two 10-brick magazines









they can be locked together, with one upside down, so you can change them easily








here you can easily see the bullpup configuration









looking in the magazine well









looking down the 'sights' (theyre not that good)









the pump









FPS










pump (unpumped)









pump (pumped)









another view of the pump pumped









well thats about it - tell me what you think!



Comments

  March 10, 2014
please sent me instructions on email: pawelek710@gmail.com
 I like it 
  July 8, 2013
Plz send instructions to davidbp59@yahoo.com
 I like it 
  July 8, 2013
Can u send instructions to build this to davidbp59@yahoo.com
 I like it 
  January 5, 2013
can u please send me the instructions maashoogenboom@gmail.com
 I like it 
  September 9, 2012
Hi, can you send me the instructions of this gun at "cagivazama@gmail.com"? Thank you very much
  June 24, 2012
plz send instructions to: qlulu@yandex.ru
 I like it 
  June 7, 2012
instructions to adam.lindfors@hotmail.com please?
 I like it 
  May 21, 2012
plz instructions to: bobcampman@xs4all.nl
 I like it 
  April 26, 2012
Hey can u send me instructions at sullycase@gmail.com
 I like it 
  February 22, 2012
Awesome! Can I get instrctions to tom.g@discovery1.school.nz
 I like it 
  February 11, 2012
nice!!! can you send me instructions to stevenash420@gmail.com
 I like it 
  January 12, 2012
please give me instruction. emall is kjsidi@naver.com
 I like it 
  December 18, 2011
please give instructions to susannah.cherry@btinternet.com
 I like it 
  December 18, 2011
please give instructions to susannah.cherry@btinternet.com
 I like it 
  December 18, 2011
please give instructions to susannah.cherry@btinternet.com
 I like it 
  February 18, 2011
please send me the instructions at lightsaber10@live.ca
 I like it 
  February 2, 2011
Please send instructions to the address chinc@mail.ru
 I like it 
  November 24, 2010
that is a cool gun i could not get my gun working like that have any tips
 I like it 
  August 13, 2010
Can you plz send me instructions? My email is legowitch@yahoo.com
  September 21, 2009
As you can tell from my creations I am knowhere near as good as you guys and I know you have been asked this a thousand times before but I will give it a try, please please please can you email me the instructions, your famas and this gun are like the holy grail to me, I want to be able to create models like this, these are simply the best creations I have ever seen. I have tried to analyse your creations but there is so much I just can't figure out.
 I like it 
  September 10, 2009
You can build another bullpup gun with this mech! Great job!
 I like it 
  August 26, 2009
can i get instructions my email is trogdor166@hotmail.com
 I like it 
  February 5, 2009
Excellent gun definitely among the best guns I have seen on MOCpages. Would you please post a further break down of the mechanism or the other side of it?
  January 21, 2009
you could a least put some picture of the inside of this gun cause ive been able to make the tec-9 with the picture but its not the best gun and this one i think its really great.
Jack Streat
 I like it 
Callum King-Underwood
  January 20, 2009
Bullpup weapons are definitely the way forwards. Good for close quarters. You can have a bullpup with a barrel the same length as a full weapon but with a much smaller overall size. I am trying to make a working gun but the only trigger mechanism I have the parts to build has the trigger in front so perhaps I will have to make it a bullpup. Also I can't make it work with more than 2 shots.
 I made it 
  January 20, 2009
bohdan im afraid that i cant make instructions for many reasons, mainly because i have too little free time and darth revan, is the hk m90 an actual gun? i cant find anything about it.
  January 19, 2009
I ask of you, what will it take for instructions!?!?!?
 I like it 
  January 18, 2009
Awesome. You are truly a great gunsmith. What I really wanna see now is a Heckler & Koch M90
 I like it 
  January 18, 2009
Jack, again you've made a great gun!
 
By Jack Streat
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LEGO models my own creation MOCpages toys shop Bullpup pump action rifle (working)Weapons


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