In June of 2018 I bought two new Glock 17/22 frames to build dedicated .22LR conversions, my records show a $75.00 price each, $125.00 including shipping and transfer.
A couple of months ago I couldn't find them in stock so I bought a polymer 80 kit to put under a Glock 24 slide assembly. It cost 150.00.
Although I've never built one, I've noticed that the 80% AR lowers are generally more than the lowers I buy online. Plus you have to pay for the jig.
I don't think it's cost savings that drives non-criminals.
Pretty sure I've only read of one incident where an 80% AR was used, do any of you have further knowledge? And if so, does that knowledge include whether the lowers were completed using a router or a CNC or other mill?
Just curious.