In the Season 1 finale "What Kind of Day Has It Been" (S1E22), one of the white supremacists uses a Beretta 92F to open fire on President Bartlet (Martin Sheen).
Error creating thumbnail: File missingBeretta 92F - 9x19mm. The cosmetic differences are very slight and hard to see. Most of the changes are the inner workings of the gun.Error creating thumbnail: File missingThe assassin on the right opens fire on the President's entourage with a Beretta in Season 1's "What Kind of Day Has It Been"(S1E22)Error creating thumbnail: File missingLaw enforcement officers draw their Berettas when apprehending a suspect in Season 2's "In the Shadow of Two Gunmen, Part II" (S2E02).
Desert Eagle
In the Season 1 finale "What Kind of Day Has It Been" (S1E22), one of the white supremacists uses a stainless Desert Eagle to open fire on the President.
Error creating thumbnail: File missingA matte stainless Desert Eagle MK I - .357 Magnum. The weapon pictured here is an actual movie gun (from the inventory of Weapons Specialists, Ltd. in New York) and has appeared in several motion pictures.Error creating thumbnail: File missingThe assassin at the bottom opens fire with the Desert Eagle in "What Kind of Day Has It Been" (S1E22).
SIG-Sauer P228
A SIG-Sauer P228 is fired by a Secret Service Agent in the Season 1 finale "What Kind of Day Has It Been" (S1E22), White House Communications Director C.J. Cregg (Allison Janney) mentions in a later episode that the weapon was a SIG-Sauer 229, but the weapon is in reality the 228.
In Season 3's "We Killed Yamamoto" (S3E20), US Secret Service Agent Simon Donovan (Mark Harmon) is seen firing a .357 Smith & Wesson Model 686 on the range. When Donovan mentions that it's a .357 Magnum, C.J. Cregg (Allison Janney) mentions that "it's a good brand". She also gets to shoot the revolver, but the recoil puts her on the ground.
A Glock 17 is drawn by Secret Service Agent Wesley (Taye Diggs) in Season 4's "Commencement" (S4E22).
Error creating thumbnail: File missingA Generation 2 Glock 17 in 9x19mm. This model added finger stepping and cuts to the backstrap of the frame to make it easier to hold than the Generation 1 model.Error creating thumbnail: File missingUSSS Agent Wesley (Taye Diggs) draws his Glock as he discovers that the President's daughter is missing in Season 4's "Commencement" (S4E22).
Submachine Guns
Heckler & Koch MP5A3
In Season 2's "In the Shadow of Two Gunmen, Part II" (S2E02), SWAT officers are armed with the Heckler & Koch MP5A3's as they apprehend one of the suspects in the assassination plot against the President. In Season 3's "Posse Comitatus", a Black Ops team is seen using the A3 to take out a foreign defense minister suspected of terrorist activities.
The M1 Garand rifle is seen held by members of a Marine honor guard detail in Season 1's "In Excelsis Deo" (S1E10). A Marine also is seen performing rifle drills with a Garand in Season 1's "Lies, Damn Lies, and Statistics" (S1E20).