At least 2 SIG-Sauer P226 pistols are seen in Season 1 in the case that was in the possession of Deputy US Marshal Edward Mars (Fredric Lane). The pistols are seen used by several of the characters throughout the season. In Season 1's "The Greater Good" (S1E21), Shannon Rutherford (Maggie Grace) is seen holding the SIG on Locke.
The Beretta 92FS is also a prominent weapon used in the series. The Beretta is seen as one of the handguns that Deputy US Marshal Edward Mars kept in a locked case that was found by Kate in "Whatever the Case May Be" (S1E12). In "Homecoming" (S1E15), the Beretta given to John Locke (Terry O'Quinn) by Jack (Matthew Fox).
The M1911A1 is seen in various models in the hands of numerous characters in flashbacks and flashforwards.
Error creating thumbnail: File missingWorld War II issued Colt M1911A1 Pistol - .45 ACPError creating thumbnail: File missingA gunman holds the M1911A1 on the bank manager in "Whatever the Case May Be" (S1E12). This appears to be a "non-gun". Note the hammer is not down, though it was just fired a second ago.
Walther PPK/S
A Walther PPK/S is also among the weapons found in the case that was carried by Deputy US Marshal Edward Mars (Fredric Lane). Charlie Pace (Dominic Monaghan) is seen using the Walther in "Homecoming" (S1E15).
Kate holds a flashcap "non-gun" that resembles the Walther PPK in Season 1's "Whatever the Case May Be" (S1E12). The non-gun Walther is also seen in the Deputy Marshal's case in the same episode.
In "Outlaws" (S1E16), Sawyer, while in Australia, purchases a Smith & Wesson Model 19 .357 Magnum with hollow points and Pachmayr grips for his revenge mission. The arms dealer says that a guy that buys a compact .357 Magnum with hollow point rounds is out to kill, not scare or steal.
In "Whatever the Case May Be" (S1E12), one of the bank robbers seen in Kate's flashback is armed with what is supposed a short-barrel model of the Remington 870. This shotgun is in reality a Non Gun version.
In "Tabula Rasa" (S1E03), Ray Mullen (Nick Tate) is seen in a flashback holding a 12 Gauge Double Barreled Shotgun when he awakens Kate. A sawn off version is later used, first carried by "Ceasar" and later stolen by Ben to kill Ceasar. Ben kept the gun under his desk in the Hydra facility.
In "Solitary" (S1E09), the AKMS is seen in the hands of the Iraqi Republican Guard during one of Sayid's (Naveen Andrews) flashbacks. The AKMS is also carried by some of the "Hostiles" after the Purge seen in Season 3's "The Man Behind the Curtain".
