does anyone know if these are definitely KAC setups, Ive got a old AAC 16 inch upper I was thinking of putting a new barrel in and this would be perfect if it will fit.
somethings got to be up, all i shoot is 220 grn sierras over 1680, in everything from a old 8 inch 300 whisper barrel to a aac 300 blk upper rem 700 aac sd and a new sig canebrake rattler they all work very well.