It took a phone call to Magpul, to figure out the screw hole issue?
Shorten the screw, or tap all the way through............should have been obvious.
I've assembled 7 on Anderson lowers, had to chase the Threads on one. Threaded all the way, they used a Dull Tap.
They must run the tooling until it dies.
I have never had a problem with any i used, for the price they can't be beat
1) Then you aren't looking hard enough
2) Yes they can