I am a tall guy and am not digging the stock on my Arsenal SLR-101s. It's a milled receiver, that obviously has the two tangs. I am not looking for a folding stock, but I do need a stock that can extend and retract. I'm not worried about cost. I want fit and function over everything. I will not cut off the bottom tang. What options do I have for an AR style stock for this milled rifle??