Interesting. Does the recoil pad add to the length of pull over a regular buttstock?
I have loooong arms and haven't had any luck finding an inexpensive way to add to LOP on my ARs.
It doesn't really add much of any LOP, but it sure cushions the recoil of the 458.
If you are looking to get an extra long LOP on an AR I would recommend Magpul UBR or PRS stocks.