Hey guys, So here is the deal, I want to add a new safety and a new rear sight to my old bushmaster. DPMS Oversized Safety Selector AR-15 Aluminum Matte - MidwayUSA and DPMS Rear Sight Aperture AR-15 A2 Matte - MidwayUSA The above image isn't my Bushmaster, but it looks like the closest thing I can find online. The rear sight is not a traditional AR-15 rear sight. There is no nob or anything. Anyone familiar with swapping out safeties and/or the rear sight?