Thanks http://vathanx.deviantart.com/ for flags!

SAS head taken from:
http://3.bp.blogspot.com/-c3hw3SlqiPM/U2NRdV-BKCI/AAAAAAABQg0/6TC7EZkraa8/s640/951_sas.jpg

Taiwan Mask:
http://www.bluedefense.com/images/detailed/0/ballistic-face-mask-front.jpg

Balaclava:
http://upload.wikimedia.org/wikipedia/commons/9/9a/Balaclava_3_hole_black.jpg

Huntsmen Corps:
http://cdn.likeaboss.com/posts/2014/08/15626/huntsmen-corps-03.jpg