Clarence "Clay" Morrow (Ron Perlman) carries the Heckler & Koch USP as his main sidearm, another holdover weapon from Seasons 2 and 3. Jax handles Clay's USP near the climax of Episode 12, "Burnt and Purged Away", and fires it in the beginning of Episode 13, "To Be, Act 1".
In Season 4, Alex "Tig" Trager (Kim Coates) starts using a two-tone Ruger SR9 as his main sidearm. It is seen most clearly in Episode 8, "Family Recipe", when he holds it on a Lobo cartel henchman.
The FN Five-seveN is featured prominently throughout Season 4 as one of the weapons sold by SAMCRO to the Mexican Galindo cartel. It is handled by both Opie and Jax, as well as being fired by Clay in the season premier. Later it is also seen frequently in the hands of Galindo security chief Romero 'Romeo' Parada (Danny Trejo) and also the Niners' leader, Laroy Wayne (Tory Kittles).
Error creating thumbnail: File missingFN Five-SeveN USG (U.S. Government), 5.7x28mm. This is the most common version of the Five Seven in channels of commerce. It has a frame mounted safety and integral rails. No FN Five-seveN is issued with a threaded barrel, however, threaded barrels for sound suppressors are commercially available as an aftermarket item.Error creating thumbnail: File missingIn "Hands" (S4E10), Laroy Wayne aiming his Five-seveN at Clay after the shootout at the Niner's club.Error creating thumbnail: File missingRomero Parada holds his Five-seveN on a man in "Call of Duty".
Smith & Wesson 639
In "Hands" (S4E10), a Niner is seen pulling out and firing a Smith & Wesson 639 during the shootout in Laroy's club.
2nd and 3rd Generation Glock 17s are seen throughout Season 4 in the hands of many SAMCRO members. Harry "Opie" Winston (Ryan Hurst) continues to use a Glock 17 as his main sidearm, and Jax also uses one (sometimes suppressed) in Episode 7, "Fruit for the Crows" after taking it from a slain SAMCRO prospect.
The Beretta 92FS is used by various members of SAMCRO throughout Season 4, particularly Filip "Chibs" Telford (Tommy Flanagan). Wayne Unser (Dayton Callie) is seen firing a Beretta 92FS to create a false crime scene in "Hands" (S4E10).
The "Pre-B" CZ 75 is used by many Russian mafiosos in "Booster" (S4E02), when they hold Jax and Opie hostage to get back their guns. It later appears in the hands of several SAMCRO members throughout the season.
In Episode 6, "With An X", the SAMCRO prospects are forced to use a snub-nose Smith & Wesson Model 15 Snub revolver to play Russian Roulette when Jax and Opie are trying to determine who stole a kilogram of cocaine provided by Galindo.
The M16A2 is one of the most commonly seen assault rifles in Season 4. It is dealt by SAMCRO to Galindo, and is also used by SAMCRO members, Galindo henchmen, and other gangs through the season. However, the rifles are referred to as "AR-15s", implying that they are semi-automatic, even though they are shown to fire full-auto/burst. Jax uses an M16A2 at the end of Episode 8, "Family Recipe", while Chibs uses one in Episode 11, "Call of Duty".
The SIG SG 552 carbine is another assault rifle that is seen often in Season 4 and sold by SAMCRO to Galindo. SG 552s are used in Episode 11, "Call of Duty" by both Romeo and Luis. In Episode 2, "Booster", when Jax is showing off the sample of weapons to Romeo and his men, he incorrectly refers to the SG 552s as "SIG 551s", referring to the longer-barreled SIG SG 551. Although the SG 551 does later appear in Episode 11, used by Jax himself, the rifles seen in Episode 2 are the shorter SG 552.
Jax carries a SIG SG 551 in Episode 11, "Call of Duty", during the assault on the local crew of Lobo cartel henchmen. Several of the Galindo henchmen and SAMCRO members also use them in this episode.
The AKM, one of the most common weapons sold and used by SAMCRO, again appears frequently in Season 4. It is dealt by SAMCRO to Galindo starting in Episode 2, "Booster". Both Clay and Juan Carlos "Juice" Ortiz (Theo Rossi) use AKMs with synthetic furniture in Episode 11, "Call of Duty".
The Heckler & Koch HK416 starts appearing in Sons of Anarchy for the first time in Season 4. An HK416 is used by Bobby near the end of Episode 8, "Family Recipe".
A major plot point of Season 4 is SAMCRO's attempt to sell heavy weaponry to Galindo, as per Romeo's request. The Barrett M82A1 is one of the requested weapons, appearing first in Episode 11, "Call of Duty" after SAMCRO imports the weapons from Ireland.
A Heckler & Koch MP5K is used by one of Tara's kidnappers in Episode 10, "Hands". MP5Ks appear in several other episodes of Season 4 in the hands of both Galindo and Lobo cartel henchmen; MP5Ks with both SEF and Navy trigger groups are seen.
Jackson (Charlie Hunnam) takes a sawed-off Winchester Model 1200 from a dead body in "Booster" (S4E02). He later fires it on the Russians. A sawed-off Winchester Model 1200 is used by Piermont "Piney" Winston at the end of Episode 8, "Family Recipe". It is then taken and used by Clay.
A major plot point of Season 4 is SAMCRO's attempt to sell heavy weaponry to Galindo. When Romeo requests "RPGs", SAMCRO imports a number of Airtronic RPG-7 launchers, which is an updated version of the original RPG-7 fitted with an M4 stock and MIL-STD-1913 Quad Rail System rails. Jax and Chibs use these RPGs in Episode 11, "Call of Duty" to save Clay, Juice, and Romeo from a Lobo ambush/minefield, much to the chagrin of the Irish Kings, who requested that the weapons not be used until sold in Mexico.
A major plot point of Season 4 is SAMCRO's attempt to sell heavy weaponry to Galindo. Romeo requests, ".50-caliber machine guns", so SAMCRO imports several Browning M2 heavy machine guns from Ireland.
The Sage Control Ordnance Deuce Revolution double barrelled over and under grenade launchers (inaccurately portrayed as HE launchers) are used by Lobo cartel gunmen in Episode 9, "Kiss", leading SAMCRO and Galindo to realize that Lobo is better armed than either side had anticipated.
