Related Clues:

• Upper case, for short
• Long letters?
• When they're locked, you look like you're shouting
• Baseball hats
• Kids' gun ammo
• Play ammo
• Maximum altitudes
• Bold alternative?
• Junior's ammunition
• Items on which baseball insignia appear
• Detonating devices
• Uppercase letters, for short
• Ballpark souvenirs
• Completely uses up, as a credit card, with 'out'
• Toy pistol ammo