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Home Made Carbine Questions.

4K views 29 replies 11 participants last post by  Robert_Redbeard 
#1 ·
I am in the middle of drawing a prototype of what I call the AT-9.

It will be a 9mm carbine with a blowback semiauto configuration.

I need to know what legally has to be featured to make it okay to have a buttstock.

As in what overall length it must be and what barrel length has to be to not be considered an SBR.

Also, do you think a lcking type bolt would be a must for it to work in .45?

Because I am thinking of designing it in .45 instead so I can use the M1911 magazine to build it. I wanna use an existing magazine and I love the .45.
 
#30 ·
Tailgunner said:
Nope, the Thompson has a rib on the back that fits into a T-slot milled into the receiver. You'd also have to replicate the receiver's feed ramp as the mag doesn't narrow down to a single stack at the top like a Grease Gun mag.
I thought they were different.

That could be an interesting feature to engineer around.
 
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