On: The AR-15 Is More Than a Gun. It’s a Gadget

[jlgreco]

My impression is that an AR15 lower receiver and an M16 lower receiver are sufficiently similar such that an AR15 lower receiver blank could be machined into either one.

Of course even if that is the case (I'm not so sure it is), the guns are still wildly different things in practice and under the law.

[RyJones → jlgreco]

You can modify an ar15 into an m16 with a drill press to add the hole.