Well, I ditched my KAC "reflex" mount for my Aimpoint and got an A.R.M.S. #22M68. I also switched over my A.R.M.S. #40 to my other M4 and replaced it with an A.R.M.S. #38S-EX-MOD. I know some will ask, so I'll get it out of the way now -- What is the parts list? Well, here ya go: Olympic pre-ban lower Bushmaster 14.5" pre-ban upper Reverse carbine flash suppressor Bushmaster 6-pos telestock Hogue grip A.R.M.S. #38S-EX-MOD A.R.M.S. #22M68 KAC RAS KAC side QD sling mount GG&G QD sling mount on front sight post GG&G QD sling mount on telestock GG&G single point sling mount Surefire M900a w/ A.R.M.S. throwlever Aimpoint CompM w/ Killflash Here's my other toy: Cavalry Arms lower Bushmaster 16" upper w/ Wilson fake FS Hogue handall KAC RAS KAC foregrip A.R.M.S. #40 BUIS Trijicon Reflex II w/ A.R.M.S. #15 mount Surefire M962 w/ A.R.M.S. throwlevers, M3 strike bezel, Z48 tailcap is in the mail Yeah, I know -- "Why the yellow lower?" Well, the lower has sat in the safe for about 2 years now and was intended to be mated w/ a 24" SS fluted bull barrel, but I haven't gotten that upper yet. So...since I came across a different upper, I decided to strap it on for the time being. I look at it this way, at least it is lightweight. I'll be getting a new lower for that upper in the near future, then later I can build my other target upper w/ the haneous yellow lower.