Ok, so this is what I ended up with.
Optic: Aimpoint PRO - I wish I could flip the knob on the QRP mount to the other side. I have smashed my knuckles more than a few times now. I am looking at the ADM Low mount as it lets me lose the knob and gets the optic a bit lower.
Sling: I am using a VCAS sling attached to the rear sling point and a sling swivel that mounts to a threaded hole for attaching 1913 rails above the trigger on the left side of the carbine. Hangs well and offers some stability when shooting.
Light: SF M600C scout in a Gear Sector Scout mount attached to a section of 1913 rail. The rail is supposed to attach at three points. What I did was move it forward 1 attachment point so it only attaches at 2 points and overhangs a bit. I can now easily hit the activation switch with my thumb while "Full Retarding" the vert grip. I am not sure if this is ideal, but it works. It also gets the light far enough forward that there isn't a huge shadow when I activate the light.
I also added two other mods:
First I put in the 2020 precision Trigger Sear Mod. (http://www.ratworxusa.com/pagDetail.aspx?SKU=TSM-M
). It changed the trigger tremendously. It is a short and crisp pull now, but feels to be about the same weight. The trigger was OK before. It is sweet now.
Second I swapped out the charging handle for the Manitcore Switchback (http://www.manticorearms.com/S...g-Handle-MA-6500.htm
). I was hoping that it would keep me from smashing my knuckles on the Aimpoint mount. It does a bit, but not enough. I do like how it stows away, offers a larger surface to grip. It is a well thought out piece of gear.
I have close to 2000 rounds through this carbine with no firing issues. PMAGS don't always "drop free" - but that is a non issue because I have found that a modified reload with retention seems to work best anyway with the mag release set up as it is. ARC mags don't fit as well as the newest 20 round PMAGS, again, no biggie I have plenty of GI and 30 round PMAGS to run this thing. The only thing I need to change is the break. Being NJ (no flash hiders here) it has a comp/break thing that practically throws the muzzle down with each shot. It literally feels like someone grabbed the muzzle and pushed it down to the ground with each shot. I have an FAC556 for it, just need to find someone to install it for me.
I think the biggest hurdle I had was realizing that it is not an AR so I needed to stop trying to set it up like one. This thing is cool. SBR sized (actually a little shorter than my issues Colt R0933 - left side of the pic) handy, and easy to shoot. I am really digging it.
Thanks to everyone for their help so far and please keep the info coming. Lots if groovy info in this thread!
Happy New Year!