Harry "Opie" Winston (Ryan Hurst) starts using a Glock 17 as his main sidearm during this season. "Half Sack" Epps (Johnny Lewis) also uses the Glock in some episodes. It's also seen in the opening credits of every episode.
Edmond Hayes (Callard Harris) retrieves a Glock 19 from the air vent when trying to kill Agent Stahl in his home during "Na Trioblóidí" (S2E13), only to find out it was loaded with blanks put there by the ATF.
In "Falx Cerebri" (S2E06), Gemma Teller Morrow (Katey Sagal) brings this .45 ACP chambered Glock 21 pistol when she shows Tara how to shoot a gun. She ends up using it to shoot up a car. You see her bring a box of .45 ACP bullets and can tell its a .45 Glock by the size of the bore and it being a full-size dictates it must be the Model 21. Gemma's Glock is seen much more clearly in "Eureka" when she tries to kill AJ Weston (Henry Rollins). As she loads the Glock in her car, it is possible to see the "21" and ".45 Auto" stamp on the slide, confirming the identity of the pistol as a G21.
June Stahl (Ally Walker) carries a Kahr PM9 as her sidearm during the Season 2's finale "Na Trioblóidí" (S2E13). A Kahr CW9 is seen as one of the guns used by Gemma to self-protect in various episodes.
AJ Weston (Henry Rollins) confronts Ule in the AB warehouse with a SIG Pro SP 2022 when he finds the empty gun crates in "The Culling" (S2E12). Cameron Hayes (Jamie McShane) is armed with a SIG Pro Sp 2022 when enters in Jax's house to confront Tara and Half-Sack at gunpoint in Season 2's finale "Na Trioblóidí" (S2E13).
In "Falx Cerebri", Cliff Weston (Aaron Refvem) uses a Smith & Wesson 3913 "Ladysmith" given by his father to protect himself and his brother when an armed and strange man enters in his home. Polly Zobelle (Sarah Jones) is seen holding a Smith & Wesson "Ladysmith" during "The Culling" (S2E12) and "Na Trioblóidí" (S2E13).
Several H&K MP5A3s are used by ATF agents in raid of clubhouse. It is also shown in the opening credits in every episode.
Heckler & Koch MP5A3 9x19mm with Surefire 628 dedicated forend weaponlight and safe-semi-two round burst trigger groupError creating thumbnail: File missingAn MP5A3 with a rail mount and selector markings clearly visible from the opening credits
Intratec TEC-9
In "Albification" (S2E01) four of the Sons can be seen testing these weapons, among others, as part of a new arms deal with members of the IRA. Throughout the season (and subsequent seasons of the show), these are referred to as "KG-9s", even though the weapons are actually TEC-9s.
Jax is seen holding a Mossberg 500 when the sons rescue Tig from several bounty hunters in "Eureka" (S2E04). Happy fires a Mossberg 500 Cruiser with extended magazine tube and heat shield in "Potlatch" (S2E08). Cameron Hayes (Jamie McShane) uses a Mossberg 500 to confronts Chibs when he breaks into his shop in "Balm" (S2E10).
