JawaKing, Power Team Elite figures aka World Peacekeepers (http://www.mctoy.com.hk/index.php/i/toyseries/2), come in a range of scales including 1:18 and 1:6. They are fully articulated, come with a wide range of accessories and are very solid toys... plus they are remarkably cheap. I picked up a range of these from BBTS a few years ago and with them now having hit retail here in Australia, I grabbed a bunch more.
As a scale comparison from camera left to right, a Navy Seal World Peacekeeper, a Lanard Corps figure, TVC Ahsoka, a Vitruvian H.A.C.K.S. male blank, a Chap Mei True Heroes Paratrooper, a Blanx Alpha blank: