Introduction: Failed Bullpup Tubular Magazine Gun

I was talking with my brother some time back about the K'NEX Contest that is coming up. He asked me what type of gun I would like to post, and I answered him (not so) simply that I wanted to take his RTMP and turn it into a Bullpup gun. As you can see, we failed at our first try, but I wanted to post it all the same, so some of you guys could take it and make it better.

Part of the problems of this gun were feeding (how the bullets "fed" into the chamber) and mechanism strength (how strong the mechanism was). Regarding the feeding problem, we just could not fix it. I think my bro tried 3 - 4 times to fix it, but it would not be fixed. As to the mechanism strength, it was really bad. You had to be able to pull the trigger really hard to get the block to even move. On top of all that, the pin would bend into weird shapes, and I and my bro did not like that.

Pros:
Somewhat comfortable
I think it looks good
The mech was not bad
It is a tubular magazine fed Bullpup gun

Cons:
Would only shoot muzzle loaded rounds
Tubular magazine fed badly, or rather, did not feed at all
Required a external pusher

So, there you have it. I really do hope somebody takes this and makes it better. Don't ask for internals, as we have taken it apart.

-E Pluribus Unum

Comments

author
captplayerlag (author)2016-03-17

Is the handle made with a similar technique as the fore grip on your brother´s Knex gun attachments?

https://www.instructables.com/id/KNEX-Gun-Attachments/
author
Johnhall14 (author)2013-06-29

Neat idea =D

author
JonnyBGood (author)2013-06-26

This is really interesting. I'm not happy that this didn't work, maybe given some more time it would. Really good looking gun though.

author

Thanks man. We took it apart to give it another go. Those pics will be up soon.

author

Alright! Hope it works out this time! After my rifle I plan to make a kind of Bolt Action Sniper Rifle. I think the mech I planning might be new.

author

Sounds good. What gun are you gonna use as you basis? Or rather, are you gonna use any gun as your basis?

author

Macmillan TAC-50. Making it for nerfrocketeer because, I always wanted to make a sniper rifle.

author

Ah, sounds awesome. Ya know, the McMillan TAC-50 was the gun that made the two longest shots ever in firearms history.

author

Wow!... I did know one record was set by it but not two. I'm surprised it wasn't with a Barret 50 cal. That's my favorite sniper rifle.

author
E Pluribus Unum (author)2013-06-28

Dude, it sounds boss. Give me some pics ASAP pleas.

author
hunter999 (author)2013-06-27

Cool!

author

Thanks. =D

author

Np

author
E Pluribus Unum (author)2013-06-28

Ah, the famous WA2000. I believe my bro has wanted to try one for a long time, but has never really considered giving the gun an attempt.

author
sandroknexmaster (author)2013-06-27

Looks good!

author

Thanks. =D

author
dr. richtofen (author)2013-06-26

Cool. As BM said, the handle is really nice.
Too bad it didn't perform great. Do you perhaps have some internal photos of it? Maybe others can help on it.

author

Thank you. Yeah, the handle was O.K. Nope, we too it apart to make a different version that you can find on my OB.

author

You're welcome.
I've seen the version on your OB, it looks 'different', but cool

author

Thanks, and yes the new version looks O.K.

author
E Pluribus Unum (author)2013-06-26

Thank you. The handle is O.K. but not my favorite. Yeah, is too bad it did not preform. My bro (The Red Book of Westmarch) really likes your stuff (or so I hear), what are you working on now? Or, can I get any inside info?

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Bio: I am a homeschooled kid from the U.S. My brother is The Red Book of Westmarch, and he helps me manage my page. My ... More »
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