Yes.
Unfortunately (as far as I know) there's one guy who makes them, and requires you send him the trigger group.
I understand that what you get back is quite good though.
ETA:
http://sierrapapacx4.com/
The set screw hole is how they get access to the gas port hole. Set up the mill once, drill, tap, drill. I think it's safe to say, "Set screw hole is lined up with the gas port"
Huh? How do you tighten the barrel nut without some sort of notch?
You still need a slot for the gas tube.
Can you post a picture of a notch-less barrel nut?
I didn't say anything about *seated*, I said *inserting*. Like there's something about actually putting the magazine in that isn't working right. If so, that would support the "magazine disconnector" hypothesis.
I had the same problem.
There’s a button on the left side that when pressed will eject a non-empty clip.
The spring under it was weak.
I removed it, stretched it to increase its length, and therefore the force it applies, and the problem went away.
I bought mine for two reasons:
1) It was used in the movie Aliens
2) I like dragging it out when someone says "blah blah blah Glock was the first polymer blah blah blah..."
Man, is it a terrible gun though. The trigger is like a staple gun. I thought I'd try doing steel plates with it...