Got a fixed magpul moe rifle stock on my Barnes Precision AR15. Really need about 2 more inches. See the magpul 0.80 extended pad only nets 0.5" gain. The $250 Magpul PRS adjustable stock, which I can't afford, will give me 1.5" extra if I put the extended .80 pad on it. However, it does have the comb adjustment, which I need as I am 1/8-1/4" too low to look through scope with a good cheek weld. But might find some sheet foam or something for that or run across a stick on cheek riser of sorts. But the length of pull is ridiculously short and I can't get this target/sniper set up dialed in as it is so ill fitting. Without spending $250 on the PRS, does anyone have any suggestions?