>Night Vision: Night vision works by taking ambient light, gathering it, then showing you the results. Upside: We Night Lords now. Downside: Any light becomes unbearable. Some modern night vision setups don't suffer this drawback.
Foregrips: There are multiple foregrips available. Some can grab onto a wall or windowsill and hold it rock-steady. Some are hollow, and can be used to store contraceptives. Foregrips add another leverageable surface, which can be used to increase accuracy by holding the rifle steadier, pushing it into your shoulder, or as a monopod.
>Bipods, tripods, and pintles:These exist to give the weapon more contact surfaces to help steady it. Some bipods can collapse and fold against the rifle for a lower profile. Bipods have two legs, Tripods three, Pintles one. A pintle mount is like the kind seen used to mount a heavy machine gun in the back of a jeep.