Fill/mill the lower, mill the vents, and a dye job. His new stock block is great. The pin goes all the way through it and the other thumb flat just screws into the pin. I cut the hooks and took as little off as possible around the magwell just to get it to snap in. Here in Indiana I do have the option of getting a real suppressor but damn..200 for the SBR, another 200 for the stamp on the can, yet another 200 for the barrel, not to mention the cost of the can itself. I guess it would be worth it once you add up what I currently have into it. :eyespop It's only money.