Things you should know...

before assembling an AR. Here's a list, and it looks like a pretty good one to me.
Confirmed this one this morning swapping the trigger guard on my buddy's AR.

Three hands are better than two. Four hands are too many, except when playing bridge.

More about the VLTOR Suppressor

Apparently the mount screws onto the barrel, and you can screw on whichever muzzle device you want that will fit inside the can. Pretty cool idea.