OK If this has been answered before I missed it so please hear me out.
My barrel has the standard front sight, the kind with two pins holding it to the barrel. I want to install a FF tube longer then the sight base. I know I have to remove the sight and replace it with a gas block, but all I've found is blocks are ones with set screws on the bottom.
Will this work or do I have to have a block with pins? If I have to have pins, who makes them?