In "Albification" (S2E01), Elian Perez (Joey Anaya) uses a Beretta 8000 Cougar in a futile attempt to shoot at Jax as he's being pursued.
Colt M1911
Piermont 'Piney' Winston (William Lucking) keeps a Colt M1911 on his cabin next to his old Army uniform and other stuff.
CZ-75BD
In "Potlatch" (S2E08), Bobby is seen using a CZ 75BD to threaten Georgie Caruso's bodyguard while they get Luann's camera and laptop back from him.
Glock 17
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.
Glock 19
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.
Glock 21
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.
Heckler & Koch USP
Clarence "Clay" Morrow (Ron Perlman) carries the Heckler & Koch USP as his main sidearm, and uses the pistol during the confrontation at Darby's cook-house.
Jericho 941
Marcus Alvarez (Emilio Rivera) uses a Stainless Jericho 941 when he confronts Jax in "Potlatch" (S2E08).
Kahr PM9
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 in various episodes.
Ruger P89
Alex 'Tig' Trager (Kim Coates) carries a Ruger P89 as his sidearm in this season.
SIG-Sauer P229R
In "Falx Celebri" (S2E06), a SIG-Sauer P229R is used by Deputy Chief Hale (Taylor Sheridan) in the Raid at Zobelle's house.
SIG Pro SP 2022
AJ Weston (Henry Rollins) confronts Ule in the Aryan Brotherhood 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 he enters Jax's house to confront Tara and Half-Sack at gunpoint in the Season 2 finale "Na Trioblóidí" (S2E13).
Smith & Wesson 3913 "Ladysmith"
In "Falx Cerebri", Cliff Weston (Aaron Refvem) uses a Smith & Wesson 3913 "Ladysmith" given by his father to protect himself and his brother when Jax enters his home. Polly Zobelle (Sarah Jones) is seen holding a Smith & Wesson "Ladysmith" during "The Culling" (S2E12) and "Na Trioblóidí" (S2E13). June Stahl (Ally Walker) briefly uses the S&W "Ladysmith" in "Na Trioblóidí" (S2E13).
Gemma (Katey Sagal) pulls the Walther PPK/S on a woman who tries to get her to move out of her parking spot in "Eureka" (S2E04).
Revolvers
Smith & Wesson Model 60
Gemma gives Tara a Smith & Wesson Model 60 to teach her how to handle a gun, they take turns firing shots at Ima’s sedan in "Falx Cerebri" (S2E06).
Submachine Guns
H&K MP5A3
Several H&K MP5A3s are used by ATF agents in a raid of the Sons' clubhouse. It is also shown in the opening credits in every episode.
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.
Assault Rifles
Norinco Type 56
Norinco Type 56 assault rifles are seen being assembled in "Small Tears". They are recognizable as the Type 56 due to the hooded front sights.
Shotguns
Mossberg 500
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).