In Season 2's "Euphoria, Part 1", Baby Shoes uses a Ruger SP101 to shoot officer Joe Luria (Scott Michael Campbell) in the episode's open. Dr. Gregory House (Hugh Laurie) tests a theory by using a similar Ruger SP101 revolver with a spurred hammer to shoot an already deceased cancer victim in the head and putting the body in an MRI machine with destructive consequences.
In Season 2's "Euphoria, Part 1", Officer Joe Luria (Scott Michael Campbell) is seen drawing his Glock 17 on a suspect at the opening of the episode. In Season 5's "Last Resort", Jason (Željko Ivanek) uses this third-generation Glock to hold Dr. House (Hugh Laurie), "Thirteen" (Olivia Wilde) and several patients hostage.
In Season 3's "Top Secret", House is seen holding an M16A2 rifle, fitted with an ACOG scope on the carry handle and a RIS handguard in place of the standard A2 handguards in a dream sequence.
Error creating thumbnail: File missingIn Season 3's "Top Secret", House is seen holding an M16A2 fitted with ACOG scope. Note that he appears to be wearing body armor with an ACU pattern while his uniform is in Marine MARPAT (but it is a dream sequence).
Ramo RT-37
One of the prison guards in Season 8's "20 Vicodin" can be seen with a Ramo RT-37 during a riot.