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A comment on The AR-15 Is More Than a Gun. It’s a Gadget. Parent comment

Re:The AR-15 Is More Than a Gun. It’s a Gadget by RyJones on Monday February 25, 2013 @02:14PM (#5281007)
Considering the difference is one hole, a pin, and some parts, there isn't much difference. If you look up the lightning link, you can make an ar15 full auto without modifying the lower, provided you can use tin shears and a saw blade (or other source of thin, flexible metal)
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Re:The AR-15 Is More Than a Gun. It’s a Gadget by speedyrev on Monday February 25, 2013 @02:28PM (#5281119)
That mod doesn't make it a M16. It makes it an unsafe, illegal AR15.
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Re:The AR-15 Is More Than a Gun. It’s a Gadget by RyJones on Monday February 25, 2013 @02:33PM (#5281164)
Not sure where you're going with this. The lightning link makes an AR15 functionally equivalent to an M16; it requires no modification to the lower; and it's no more or less safe than a "Connecticut M16" (M16 with safe-auto-auto selector).

Illegal, yes, if you aren't an SOT or aren't using a registered lightning link.i

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Re:The AR-15 Is More Than a Gun. It’s a Gadget by hga on Monday February 25, 2013 @03:36PM (#5281605)
I'm not familiar with this mod, but the BATF has a standard they (in theory, and most of the time) use for what they allow manufacturers to sell to civilians: a trained machinist with a normal machine shop has to take more than N hours to do the conversion. That's why a whole lot of open bolt derived from sub-machinegun designs had to be changed to fire from a closed bolt with a separate firing pin (the normal submachine gun design as I understand it, at least as of WWII state of the art, has a fixed firing pin in the face of the bolt, the H&K MP5 being a notable post-WWII exception).
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Re:The AR-15 Is More Than a Gun. It’s a Gadget by RyJones on Monday February 25, 2013 @04:37PM (#5282000)
My "mod" is drilling the sear pin hole (above the selector), removing the semi auto fire control group, installing a full auto fire control group (including sear and pin). You may need a new bolt carrier to trip the sear.

You can buy AR lowers with (IMHO) ill advised fake sear pins to mimic the look.

The lightning link is even easier. Check Quarterbore's website for details.

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