I have two rifles, one a 16in bbl bushmaster and one 11.5 bbl bushmaster.  I want to use a sound suppressor (Gemtech m402) on the 11.5in rifle.  I have a surefire M73 rail system and an arms sir #45M rail system. I also have an eotech holosight (aa version) and an aimpoint Comp 2.  The 16in rifle isA3 (flattop) and the 11.5 is A2 (carry handle).  I'm curious to hear opinions on the best combination of rail systems and optics for these rifles.  Please post below or email [email protected] with suggestions.