Safety device for firearms

A firearm safety device for a firearm having a trigger and trigger guard. The firearm safety device includes a first and second assemblies adapted to be secured to the firearm on opposite sides of the trigger guard to prevent access to and actuation of the trigger. A moveable clamp assembly includes slide member having first and second posts for receiving a portion of the trigger guard therebetween is disposed on the first assembly for slidable movement. A fastener is used to secure the slide member to the first assembly in a position to accommodate the trigger guard thereby preventing further sliding movement. Trigger guards having pins received in the apertures can be used to block access to and actuation of the trigger. An alarm is included which sounds when the firearm is moved or when an improper sequence of keys are pressed in an attempt to unlock the device. The alarm preferably sounds continuously during a first time period and intermittently thereafter. The firearm safety device can include a keypad having a single row of keys for quickly unlocking the device. Finger positioning guides can be used to provide tactile references for guiding the fingers into contact with the keys.