Hey guys, just got done cleaning my ar15 for the first time. Along the way, a few questions came to mind.

1. When I was testing the retention of my bolt by flicking the bcg, I noticed the cam pin rotates in its slot a bit. Any chance the cam pin will rotate 90 degrees and make its way out? With the bcg out of the gun, I felt like I could do this.

2. The firing pin, when put back in, there’s still some play and it moves with the bolt slightly. Does it matter if the firing pin and the firing pin retainer pin was installed with the bolt pulled out or pushed in?

3. For lubricant, I picked up some Mobil 1 full synthetic 10w30. Is this the standard weight for Mobil 1 or do you guys use something different in your guns?

Thanks guys; im a noob but I feel accomplished haha.

Never heard of a cam pin falling out you should be ok , as far as i know the position of the bolt doesnt matter when inserting the firing pin. The firing pin does have some back and forth  play once installed . Alot of guys on hear swear by mobile one i use go juice so cant help much there

Cam pin cannot fall out unless you leave the firing pin out.

This.

That or turning the bolt 180 degrees off.  You usually figure that one out after a shot or two.

The hole in the bolt where the cam pin goes is tapered, so really there's only one way to put it in haha - at least in the newer ARs. And again, thank you for all the useful and accurate information you provide. Time and time again, I've gone back to check my AR to personally validate your information and it has always been spot-on. You really know your stuff.