You know, the thingy that folds up. (SOMEONE had to say it.)
The idea is that as the gun heats up, a shroud over the barrel means you can still grab it there without burning your fingers.
What does a headshield do?
Someone had to say itI suspect it acts like a helmet
I think all semi-auto so-called assault weapons and military rifles before that typically had heat-shields. Even the semi-auto pistol barrels are shrouded. You just don't have certain experience and aren't even looking in the right place. Try just in front of the receiver. Are all the too-tacticool-for-the-room-to-be tacticool folk here taking the handgaurds and upper-forearms off of their rifles? Not!If I am going to be shooting 20 rounds or more, I will use my AR or even a .45
A lot of semi-automatic rifles (known by the brady bunch as "Assault Rifles") don't even have that shield. :