Marksman

You’re a deadeye with firearms and have studied and mastered military tactical combat techniques:

• You do not have disadvantage on ranged weapon attack rolls while prone.
• As an action, you lockdown a section of the battlefield with suppressing fire. Define a 20-foot cube within sight. When a target you can see enters or moves within the area for the first time on a turn, you can make a ranged weapon attack against it with a firearm that lacks the blast and scatter properties, so long as it is in range.
• Your ranged weapon attacks ignore half cover and three-quarters cover.