I currently work for a gov contractor and while at a job site today at a large coastal Southern California base, I came across a few cans of these.
They're single stack, not rock-in, 5-7 rd capacity, case is a loosie .308 from shooting last weekend.
Which firearm uses this particular magazine?
Thank you, gentlemen.
http://i57.tinypic.com/33yoq37.jpg