I have an AR-15 style carbine on which I've placed a Magpul M93 stock. I first saw that stock in a magazine in 2003 that had an article about the USMC's first contribution to SOCOM with "Detachment 1" or "Det 1". I saw a photo in which several members of that team were on a firing line with their specially made Kimber 1911s aimed, while their iron sighted M4A1s hung from single point slings. Their faces were censored. Each M4A1 was painted tan, had a suppressor, and had a stock I'd never seen before. It looked like a good design. It has the same cheek weld regardless of where it is telescoped to, and comes with internal clips that allow you to have pre-set telescoping positions. Obviously something more for serious real-mccoy operators, but hey, I'm just a guy that likes guns and anything to do with them.
I figured some of our best warfighters were using them so I was mostly sold on the thing at that point. I looked that stock up and found it for somewhere in the neighborhood of 275 dollars, and I can't remember if that included the price of the two sling fittings I bought with it - one for a regular sling loop and one with an HK style snap ring. I also really hated the g*y foam padded non adjustable tube stock that was standard on my Bushmaster XM-15E2S and needed to replace it.