Add a cheek weld to your si folding brace/stock - Strike Industries Strike Folding Stock Adapter Cheek Riser

Pretty straightforward addition that's a no-brainer for adding to your Strike Industries folding brace or stock. Solid construction and attachment is easy with two thumbscrews and allows for adjustable height and angle. Huge ergonomic improvement that I only wish was included by default with SI's brace/stock, but it's also very reasonably priced, so I can't be too mad about that - maybe it's not something that everyone would want, I guess.