I took my Bushmaster out of it's case and found it broken. Yes the fire breather. The jam nut came unjammed, which loosened a plate which held in a spring which made one of the pins holding the upper and lower together to fall out. Had to take the folding stock off, put spring back in, etc..etc.. It is fixed now. Kind of messed with me at first. It is a 900.00 rifle.
Keith