I don't know if it's the right terminology for AR's or not but fully collapsed the set up now has an 11" LOP (about). The LOP on that Strike Industries Viper says its 9.25".

Also the height of it is more than 1" shorter height wise. Also the tip is turned under a bit more aggressively it seems like.

So far based on that alone that is the one to beat. It's got both dimensions down. It might just be worth a try. I have tried several Strike Industries products and I have liked them all so far. At very least it would give me more leeway. It could be a $50 experiment, but who knows. Anyone know of anyone who has tried that specific stock?

Anything else in the stock category (from any manufacturer) come anywhere close to that?