Concealed Weapon (D20 Modern Feat)
From D&D Wiki
You are never without a weapon, even if you’ve been searched or patted down by the best.
Prerequisite: Sleight of Hand skill 4+.
Benefit: Whenever you are searched, you gain a +10 competence bonus to your Sleight of Hand checks to conceal one small item or weapon (e.g. a lasgun, a knife, or a wallet). This feat cannot defeat full body mechanical sensors (such as sonar probes or poison snoopers).