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.
I use the TUBB carrier weight system and the flatwire spring in my finicky 300 blk guns and they work awesone, its adjustable to several different weights. and the sping has been great, even on its own