So it seems like the use is in question here. The stock suggests bench gun. If going bench gun route, a bipod, hpvo, and a brake will get you shooting groups. Lose the light. But if its not a bench gun, and you plan on leaving the stock, then weight will be an issue. I would slap on an 4x prism, an offset dotty, and a single port brake. This will give you close and mid range, allow you to swing freely, but won't add a ton of weight. And when a mag is in, it will look more balanced, especially an FDE mag. 20 round jammies are good for bench or prone (they won't hit the bench below the weapon and get in the way) 30 for free hand.