Knox axxiom stock off my howa 1500, length of pull adjusts from around 11" to 15" easily. Used it for my nightvision add on, meant I was a bit further from the scope and comfortable. Really good stock but now not using the nightvision much so going back to the standard hogue stock.
If you've got a nice laminate stock might be able to do a but of a part ex tho?
Seen them for sale for £500 new, Looking for £250 delivered for it.
drop me a pm if your after it or have something to part ex.