Laser Gun

The Laser Gun is one of the many weapons that Gru is known to use.

Despicable Me
Edith playfully points the laser gun at Gru briefly before Gru snatches it away from her. She obliterates Agnes' old unicorn with it. This iteration of the Laser Gun resembles a full-sized firearm with the length of a rifle.

Despicable Me 2
Gru uses his pistol laser to cut a hole into the roof of the kitchen at the Salsa & Salsa, saving him and Lucy Wilde from Eduardo Perez's wrath.

Trivia

 * Strangely, in DM2, the laser appears to be fired from the weapon's sight attachment, unlike real laser sights which only supplements aiming.