I have been asked what does it take to convert the 15-22 to a Bullpup.

Answer: 13 seconds

https://www.youtube.com/watch?v=Ne62Q5R9JgM

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15-22 bullpup, "X-terminator"

Nice... but wouldn't the timing of assembly or conversion include that upper adapter as well?

with that... three questions...

1. wouldn't this bullpup lower receiver be registered as a firearm?

2. couldn't you just use any upper with this lower? Which would prove cheaper than purchasing a $600 weapon to then spend and additional ??? to convert it to the bullpup design and trash the lower.

3. How would it stand up with an .223 upper?

I'm not knocking the your bullpup design at all... on the contrary, I think it's great. I just wanted to ask.

Thanks!

I still want one.

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Disabled Army Vet - 37F/82C

I think Rundover was just giving the smart aleck answer...it's the kind of answer I probably would have given as well.

The bullpup lower receiver is a firearm. It's home made so it doesn't need to have any of the engravings that are federally required of manufacturers. Local state laws may vary (and could possibly include registration).


Any 15/22 upper? What $600 firearm do you mean? He has the original lower and can swap back and forth between normal rifle and bullpup in 13 seconds in each direction. The original lower hasn't been trashed.

It wouldn't. A regular AR-15 upper needs the receiver extension/buffer tube for the bolt to travel into coming out the back. Trying to use one on this bullpup receiver would either blow the thing up, or be single shot with a ridiculous reloading procedure.

I was referring to the 15-22. I understand it can be swapped back to the original lower... But let's be honest, who's going to switch back?? Lol...

I was just wondering, why not use a dedicated .22lr upper and maybe cut down the cost of purchasing a complete 15-22 and the bullpup lower? There are a wide range of compatible uppers that could be used... Maybe consideration for ejection port changes, forward assist locations, etc. could come into play.

And as far as the AR... If you used a piston upper you wouldn't need the buffer tube... Sorry, I should have been more clear.

Just some thoughts. Thanks for the response.


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I think a dedicated .22 AR upper would run almost as much as a complete 15/22. 15/22's can be had sub $400 fairly easily. I even saw one for $299 this past weekend for active or retired military (threaded barrel too). No real cost savings there. Most of the conversions (all that I'm aware of) are also still made of metal, so no weight savings either. A dedicated 22 AR conversion version of this also isn't appropriate for this forum.

Piston uppers are not all the popular and are generally part specific to the manufacturer, which kind of goes against why ARs are popular. Sig 556 is probably a better choice for a non AR15 type of AR15. And a Tavor for a bullpup.

This is what it is, a fun one off for the 15-22. I hope it does come to fruition as a released product. Because of the versatility and fun it would allow I'd definitely be in for one, but only if I can go back to rifle configuration. For instance, I would never buy one of those Red Jacket 10/22 bullpup kits.

By the way, not trying to shoot down all your ideas or anything, just weighing in with my own thoughts.

No, I totally see your point and I appreciate your playing devils advocate. I enjoy hearing all sides and learning something every now and then as well.

I would love to see the design become available... it's a great little idea and I have never been a fan of the Bullpup design.

Also, you've gotta love being able to get around that whole SBR stamp!

A project like this for a specific model that has a known upper configuration from the factory is a good start. The differences between the uppers for standard ARs and 15-22s is also a consideration. But if this were to take off for the 15-22, another model specific to AR conversion kits could be feasible. Whether it's Rundover or someone else taking that project on.

I don't own a piston upper so I may be wrong here, but my understanding is that the difference between a piston upper and a direct impingement upper is that the piston upper uses a rod to push the bolt carrier group back and the DI upper uses gas.

In both cases there is a BCG that needs to be pushed back into the buffer tube to eject the spent case and push in the next round off of the magazine and into the chamber (thus requiring a buffer tube for either method).

-Ruskie

Rock River Arms: LAR-PDS Carbine

Here's another.





And another... Olympic Arms



and another... Para-Ordinance



http://www.impactguns.com/para-ordna...rel-ttrxa.aspx

There are some custom uppers that don't require a buffer tube, and I believe they are all piston based. Just because it's piston based doesn't mean it doesn't have a buffer tube, but the ones without buffer tubes are all piston based (I think).

Yes, there are only specific models... my reason for displaying them is because it would make a great bullpup!

Hay, my son just bought a new Canon EOS 70d camera and wanted some practice so I told him have at it and this is where the video came from.
Did anybody even notice that there was no charging handle catch?
I removed it because every time I removed the upper the bolt would come flying out. I am now using rare earth magnets which seems to do a better job and also works better in the Bullpup with a forward charging handle.

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15-22 bullpup, "X-terminator"

ill take one of these kits any day.

Any news on this?

I am still working on getting it manufactured.
If anybody is in south Florida you are welcome to try it out.

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15-22 bullpup, "X-terminator"

Wish I was closer, I would love to give it a spin. Saw couple of the vids you posted and it looks like a winner!