WTS M4 14.5" bushmaster upper with AK74 brake This is a 14.5" 1/9 twist chrome lined HBAR 5.56 NATO barrel with a pinned AK74 brake making 16" OAL. A2 upper stripped with M4 hand guards, carbine gas tube and A2 FSB. All Bushmaster OEM gear. Less than 500 down the pipe. Asking $300 FTF Houston-Magnolia. i work downtown and can meet up in the area.