Dead Eye

You put a lot of time training yourself with ranged weapon, seeing things far and notice things better. You are more proficient with ranged weapons. You gain the following benefits.

• Increase your Dexterity score by 1, to a maximum of 20.
• As action, you can mark enemy's weak spots times, equal to your proficiency bonus using firearm weapons (1 time if weapon needs a reloading after shot) and then shoot. If your firearm is out of bullets, you stop shooting (Feat action is still consumed). These shots are critical. You can mark one target multiple times. You can use this feat 1 time per short rest, 2 times at 5LVL., 3 times at 11LVL., 4 times at 17LVL. ("long rest" for more balance).
• Add +2 to your skill checks, based on vision.