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Skibane
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Posted: 7/11/2013 12:28:57 AM
[Last Edit: 7/11/2013 12:35:55 AM by Skibane]
mak0's "Melt It Yourself Lead Core Lower" thread got me to thinking about another 80 percent lower concept:

1. On paper, an AR lower is "sliced" lengthwise into several sections - Let's say 4 sections.

The lower that these sections are based upon is ordinary, except that it includes provisions (i.e., screw or rivet holes) for adding fasteners to "laminate" several sections together.

2. A different CAD drawing for each of these 4 sections is produced, and made freely available.

Individual companies pick one of these 4 sections to manufacture and sell. No single company manufactures or sells more than one section type.

4. End-users purchase sections from various companies, in separate transactions for each section.

How is this not legal?

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LuckyDucky
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Posted: 7/11/2013 12:38:24 AM
[Last Edit: 7/11/2013 12:40:55 AM by LuckyDucky]
Why not just cut the lower in half lengthwise and cut the threaded part off so you have 3 pieces.

Make a screw or latch of some sort to put them together and sell pieces separately

No 1 piece would require an FFL

Or is that what you're saying?

What's that have to do with laminated 80% lowers?

mizzarley
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Posted: 7/11/2013 12:40:24 AM
Originally Posted By Skibane:
mak0's "Melt It Yourself Lead Core Lower" thread got me to thinking about another 80 percent lower concept:

1. On paper, an AR lower is "sliced" lengthwise into several sections - Let's say 4 sections.

The lower that these sections are based upon is ordinary, except that it includes provisions (i.e., screw or rivet holes) for adding fasteners to "laminate" several sections together.

2. A different CAD drawing for each of these 4 sections is produced, and made freely available.

Individual companies pick one of these 4 sections to manufacture and sell. No single company manufactures or sells more than one section type.

4. End-users purchase sections from various companies, in separate transactions for each section.

How is this not legal?



Or just make and sell a bolt together kit, and just leave one of the less complicated parts out of the kit. End user makes it. I have shop space


SeanC
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Posted: 7/11/2013 12:45:07 AM
Sounds pretty much like MAC side plates and center sections. You don't see the same company selling both.
LuckyDucky
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Posted: 7/11/2013 12:47:40 AM
[Last Edit: 7/11/2013 12:53:20 AM by LuckyDucky]
Heck, you could take an AR lower and make an integral buffer tube and just slice it in half longways

Make the lower so a clamp would fit around the magwell and 2 on the integral buffer tube.

And make slots in the parts so they fit precisely together. Maybe make it so you put roll pins in the slots to hold it together

No serial number, no FFL, no problem!



As a disclaimer, the ATF would probably frown on this.
Bogie
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Posted: 7/11/2013 12:59:21 AM
There is a bolt together lower out, mostly flat plate & 10-32 screws

LuckyDucky
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Posted: 7/11/2013 1:00:03 AM
[Last Edit: 7/11/2013 1:01:24 AM by LuckyDucky]
Originally Posted By Bogie:
There is a bolt together lower out, mostly flat plate & 10-32 screws



awesome

http://www.assaultweb.net/forums/showthread.php?t=133335
Skibane
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Posted: 7/11/2013 1:01:30 AM
[Last Edit: 7/11/2013 1:04:42 AM by Skibane]
Originally Posted By LuckyDucky:
Heck, you could take an AR lower and make an integral buffer tube and just slice it in half longways

Make the lower so a clamp would fit around the magwell and 2 on the integral buffer tube.

And make slots in the parts so they fit precisely together. Maybe make it so you put roll pins in the slots to hold it together

No serial number, no FFL, no problem!



As a disclaimer, the ATF would probably frown on this.


Using just 2 "sections" simplifies the assembly process for the end-user, but it also reduces the legal separation between the individual part and the finished product.

Having different companies manufacture each section is another firewall against legal repercussions - No company can be accused of making a part that by itself could be used to make a complete receiver.
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ORMilitia
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Posted: 7/11/2013 1:05:24 AM
I ordered mine in 4 sections


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Dave_Markowitz
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Posted: 7/11/2013 9:56:15 AM

Originally Posted By LuckyDucky:
Originally Posted By Bogie:
There is a bolt together lower out, mostly flat plate & 10-32 screws



awesome

http://www.assaultweb.net/forums/showthread.php?t=133335

I've made a few parts towards one of these but got distracted and have yet to finish it.
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Posted: 7/11/2013 10:09:11 AM
[Last Edit: 7/11/2013 10:09:58 AM by CKxx]
Shockergd
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Posted: 7/11/2013 10:10:30 AM
I've just about got a DIY 80% lower together, would cost the end user $150 to buy a 'kit'. Each 'kit' would produce 10 lowers or so. Phenominally easy to make, very rugged too.
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ronnl001
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Posted: 7/11/2013 10:18:39 AM
Originally Posted By Shockergd:
I've just about got a DIY 80% lower together, would cost the end user $150 to buy a 'kit'. Each 'kit' would produce 10 lowers or so. Phenominally easy to make, very rugged too.


This interests me.
macman37
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Posted: 7/11/2013 10:19:06 AM
Originally Posted By CKxx:
It's "bin dun befo"

http://www.theflatspot.net/ar-15-receiver-flat.html


It was dun befo that... Look up KT Ordnance.

The ATF frowned upon those shenanigans.
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ColonelPanic
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Posted: 7/11/2013 10:28:16 AM
What about molds and Field's metal? You could make your own molds with casting sand once you have one, and the lowers usually stay relatively cool, hopefully below 144F.
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CKxx
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Posted: 7/11/2013 12:23:45 PM
Originally Posted By macman37:
Originally Posted By CKxx:
It's "bin dun befo"

http://www.theflatspot.net/ar-15-receiver-flat.html


It was dun befo that... Look up KT Ordnance.

The ATF frowned upon those shenanigans.


The kit I linked requires quite a bit of welding, not just some screws.
garr
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Posted: 7/11/2013 12:28:43 PM
Guys, during the 94-04 ban everyway to possibly build a lower was tried multiple times, most were not pretty but most worked fine. search the archives, it's all there.
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Posted: 7/11/2013 12:31:04 PM
I am just going to continue making mine out of oak with metal sleeve inserts for the pins.
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ORMilitia
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Posted: 7/11/2013 12:51:35 PM

Originally Posted By shotgunfatcat:
I am just going to continue making mine out of oak with metal sleeve inserts for the pins.

Wood look awesome with this furniture


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Posted: 7/11/2013 12:57:16 PM
Originally Posted By LuckyDucky:
Originally Posted By Bogie:
There is a bolt together lower out, mostly flat plate & 10-32 screws



awesome

http://www.assaultweb.net/forums/showthread.php?t=133335


stamped metal

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ColonelPanic
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Posted: 7/11/2013 4:00:30 PM
[Last Edit: 7/11/2013 4:00:45 PM by ColonelPanic]
Edit: Wrong thread.
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Posted: 7/11/2013 4:43:26 PM
Originally Posted By LuckyDucky:
Heck, you could take an AR lower and make an integral buffer tube and just slice it in half longways

Make the lower so a clamp would fit around the magwell and 2 on the integral buffer tube.

And make slots in the parts so they fit precisely together. Maybe make it so you put roll pins in the slots to hold it together

No serial number, no FFL, no problem!



As a disclaimer, the ATF would probably frown on this.


not roll pins, create a clamp force with screws/bolts.
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Posted: 7/11/2013 4:59:38 PM
Originally Posted By Shockergd:
I've just about got a DIY 80% lower together, would cost the end user $150 to buy a 'kit'. Each 'kit' would produce 10 lowers or so. Phenominally easy to make, very rugged too.


Go on...
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Posted: 7/11/2013 5:01:04 PM
Originally Posted By ORMilitia:
I ordered mine in 4 sections



came here to post this.