Hell if it's Todds shit I wouldn't buy one!It's a Todd Bailey HK416C to MP5K 5 position stock. I really like the stock, I bought it as Blem stock but I can't find anything wrong with it. Grant it, it doesn't fold up nice and tidy like a traditional k stock, it feels more useful. At first I thought the butt plate was too small, but I've adjusted my shooting position a little and it works great. No regrets, probably the best thing I've bought from Bailey, well that and several receivers. I'll see if I can find a link to his auctions.
I can't track them down, but I'll keep an eye out and post it if I find them again.