new rodeo questions

[davmitchell77]

just picked up a rodeo at the local pawnshop, and it appears totally stock, and in good shape. pic soon. i need to know how low i can adjust the regulator before i need to fiddle with springs. my shutter is at 500, all stock, and it doesnt seem to be an issue. i plan to upgrade to an egrip, do i need to replace the striker? it will get a lapco clamping neck, anyone think they can match the marble anno? i want the stock barrel milled to accept freak inserts, but the local machine shops wont do it. any online companies recommended?