BKP "Sparrow" Smallbore

Source
BKP "Sparrow" Smallbore is an uncommon world drop item; it can be dropped by level 29–35 mobs in old world zones, or found inside Iron Lockbox.

Trivia

 * This is the only gun in the BKP series with a rarity higher than common. The other two are BKP 2700 "Enforcer" and BKP 42 "Ultra".