More Lethal (4e Future Equipment)
From D&D Wiki
Level 7 Average Weapon Mod Equipment
Cost: 300 credits
Weight: - lb
Benefit: If you score a critical hit with this weapon, you deal an additional 8 damage.
When this weapon finds its mark, it deals more damage. It might be a projectile that expands in the targets flesh, a blade that tears bone, a particularly deadly poison, and so forth.