[ImJustAnotherOkie]

I don’t know about that, but I saw another post showing this rifle with the compensator vents facing down. Improperly installed.

[marktwain]

That was a different rifle, but from the same BBC story.

[archy]

I don’t know about that, but I saw another post showing this rifle with the compensator vents facing down. Improperly installed.

There's only one slot missing on the M16A2/M4 flash hider, to prevent vented muzzle gasses from kicking up dust when fired from the prone position. You sure that hodgepodge M16A1 lower/M16A2 upper doesn't have an M16A1 flashhider on it?