Grenade Launcher

Dean Winchester owns a Grenade Launcher which he keeps in the trunk of The Impala.

The grenade launcher is first seen inside a weapons box in the trunk of the Impala in the Pilot episode. This version is a CAW 40mm airsoft grenade launcher. In subsequently appearances, it is replaced with a genuine DefTech 37mm launcher.

In Trial and Error, Dean hangs some of his weapons on the walls of his new room in the Men of Letters bunker while decorating it. Among these weapons was a grenade launcher.

In The One You've Been Waiting For, Dean picks up the grenade launcher for the first time with the intent on using it against a group of Thules. Unfortunately, Sam tells him to leave it in the trunk, as they need to be stealthy which leaves Dean visibly disappointed causing Sam to promise him they will get to use it at some point. Once they enter the Thules' base of operation, they are immediately captured and disarmed, leading Dean to say "should've bought the grenade launcher."

In LOTUS, Arthur Ketch uses a grenade launcher to destroy a Secret Service vehicle and rescue the Winchesters and Castiel. Dean later asks if Arthur used a grenade launcher with obvious enthusiasm which Arthur confirms.

In Regarding Dean, when a memory-less Dean opens the trunk, he finds that Rowena has labeled the grenade launcher with "NO!" Even without his memory, Dean appears to be disappointed about not being able to use the grenade launcher.

In Twigs & Twine & Tasha Banes, Dean shows the contents of the Impala's trunk to Max Banes who is impressed by the grenade launcher. While Dean confirms that it is in fact a grenade launcher, he regretfully tells Max they need witch-killing bullets instead.

In Who We Are, an excited Dean finally uses the grenade launcher to blow a hole in a bunker wall in order to reach the sewers beyond. This allowed him to hit the bunker's manual override and end the fatal lockdown imposed by Arthur Ketch.

Appearances

 * Season 1
 * Pilot


 * Season 8
 * Trial and Error


 * Season 11
 * Out of the Darkness, Into the Fire
 * Season 12
 * The One You've Been Waiting For
 * LOTUS
 * Regarding Dean
 * Twigs & Twine & Tasha Banes
 * Who We Are

Trivia

 * Despite its usefulness and potential to solve numerous cases throughout the years, the grenade launcher was never touched, leading to a running gag within the fandom.
 * Following Season 12, fans continue to demand for the use of the grenade launcher.
 * In Who We Are, Dean has finally used this to blow up a wall in the Men of Letters bunker. Dean also quips "yippie kiya mother...!" when doing it. This is the catchphrase of John McClaine from the Die Hard series and what Dean said when he killed Elias Finch with the Colt.
 * In LOTUS, when Dean gets excited over Arthur Ketch using a grenade launcher, Sam can be seen to briefly raise a pacifying hand to Dean's enthusiasm.
 * In Who We Are, Dean calls his plan to use the grenade launcher "big, beautiful and dumb" and then states that he has had the grenade launcher for "so long" and has waited for the perfect moment to use it.