#1. Ambi safety. I won't kid you. There's really only one way to go, and you know what I'm gonna say. The BAD-ASS. You're LEO - get your a$s on DSG Arms and send in your credentials, so you get your MIL/LEO discount. Snatch your BAD-ASS from them. It's gonna be around $40 for the basic setup - standard long side and short side. It's the smoothest ambi out there, and I've tried a few others. They don't compare.
#2. The VG6 muzzle devices are pretty damn good, and you can find deal on them. The Epsilon is a combination brake/comp/flash hider, and it's good. The Gamma is just a brake/comp combination. Any suppressor that you can attach to an A2, you can attach to those.
#3. I'm a big fan of Dtreamlight weapons lights. You could even toss a pistol light on a piece of pic rail on the side of your rifle - they have a LOT of lights, brother.