Lower question

[dubleuhb]

So I got tinkering around with this lower, gonna put a new trigger and ambi selector on. Done this before a few time but never had a selector with a screw on it. It has a detent ball and slot but I can't get it to turn more than about 1/8 turn.

What's the deal? Bushmaster XM15-E2S.

 

[Exonautic]

Is it a 60 degree throw lever? That would explain the limited turning radius. Try function testing the trigger in both positions you can put it in. Idk what the last picture is supposed to show but that's upside down.

 

[GUNSICK]

Adjustable safety, they usually have hex cap screws. If you can’t get it out use a dremel and grind it flush.

Looking at it again it looks like someone replaced one of the two hex caps with a headed screw.

 

[dubleuhb]

Got it torn down and new parts in and functional.
Nothing was ever replaced on this, I bought it new maybe 15 years ago. I bought some new stuff and finally decided to mess with it.
Well I have another lower, same model and the selector was a one piece deal, drop the grip, spring and detent and out it slides. Luckily I had some tiny hex driver to back out the set screws, had to use a Jewelers loop just to see them.