1. Put a button in Feat list to be able to sort it alphabetically.
2. Pistol Feat: Headshot.
A headshot requires the target to be no further than 3 squares; it's done at 50% penalty to hit (flat discount) and it does 250% normal damage.
Cooldown: 4 turns. To make it less accessible, maybe it would require both Aimed shot and PER 10.
Yes. I know this resembles a lot the "execute" feat or "snipe" for pistol. But this one doesn't require the target to be stunned.