The SEALs in the series carry Heckler & Koch HK416 carbines with 10-inch barrels, Geissele Super Module HK handguard, Magpul PMags, Magpul CTR stock, EOTech XPS3, Magpul RVG, Surefire M300 Scout mounted on a Unity Tactical Fusion and a Surefire SOCOM-RC2 556 suppressor. All the HK416 carbines are painted in dark earth camo.
Heckler & Koch HK416 (14.5" barrel)
Clay Spenser (Max Thieriot) carries a Heckler & Koch HK416 with a 14.5 inch barrel and fitted with a suppressor and a scope to better suit his role as the Team's designated marksman. In "Say Again Your Last" (S2E05), Ray uses Clay's weapon after Clay is hit. Trent uses it as his primary weapon while on an op in Al-Hasakah, Syria in "Things Not Seen" (S2E12).
Mk 18 Mod 0
The SEALs in 2013 flashbacks are carrying Mk 18 Mod 0s with KAC suppressors, AN/PEQ2s, EoTech holographic sights, VFGs and flashlights.
AKM
The AKM is usually seen with hostiles in the season.
AKM (Modernized)
Saudi Army Special Forces Brigade commandos carry modernized AKM rifles fitted with black polymer furniture, suppressors and optical sights in "Never Say Die" (S2E02). These are most likely standing in for the AK-103 rifles that are used by Saudi special forces in real life.
AKMS
The AKMS is seen with hostile forces in the season.
Colt M4A1
The Colt M4A1 is carried by Mexican Federal Police in "Never Say Die" (S2E02). Some Mexican Marines are armed with the M4A1 in the Mexico story arc. Lieutenant Juan Lopez (Bobby Daniel Rodriguez) uses it in "Prisoner's Dilemma" (S2E10) after he volunteers to work with the SEALs without any support from Mexico City. US Marines use them from time to time, notably in "You Only Die Once" (S2E15). Commander Johnny Bayani (JB Tadena) of the Naval Special Operations Group uses it when he accompanies Bravo Team in "Payback" (S2E18).
Colt M16A2
The Colt M16A2 rifle is carried by Mumbai police at the university in "Say Again Your Last" (S2E05). This is an inaccuracy since Indian police forces are mostly equipped with domestically-produced firearms such as the Lee-Enfield, L1A1 SLR and INSAS rifles. Some Mexican Federal Police officers carry the M16A2 in "Hold What You Got" (S2E06). Chipas State Police use them in "Prisoner's Dilemma" (S2E10).
FN FAL 50.63 "Paratrooper"
The FN FAL 50.63 "Paratrooper" is seen with Ray in "Parallax" (S2E08) while masquerading as a Merida Cartel soldado.
Heckler & Koch G36K
The Heckler & Koch G36K is seen in "Parallax" (S2E08) with Clay while undercover as a Merida Cartel soldado.
IMI Galil SAR
The IMI Galil SAR is seen with a Mexican Marine while undercover as a Merida Cartel soldado in "Parallax" (S2E08).
IMI Galil MAR
The IMI Galil MAR is seen with Trent while undercover as a Merida Cartel soldado in "Parallax" (S2E08).
Ruger AC556K
Several Doza Cartel soldados appears to be armed with a Ruger AC556K in "Hold What You Got" (S2E06). Brock Reynolds (Justin Melnick) uses it in "Parallax" (S2E08) while posing as a Merida Cartel soldado.
In few episodes Bravo team uses a Knight's Armament M110, fitted with a collapsible stock. The M110 can be visually differentiated from the SR-25 Enhanced Carbine also seen in the show by its unique gas block and its trademark over the barrel M110 reflex suppressor.
Accuracy International AXMC
The Accuracy International AXMC appears to be the rifle used by an SAS sniper in "Backwards in High Heels" (S2E11).
Pistols
Glock 17
Both suppressed and unsuppressed Glock 17 pistols are seen used by SEALs and other characters in the series.
Glock 19
The Glock 19 is used by both Bravo Team and SAS operatives, including Sgt. Maj. Nigel Wickham (Luke Mably) in "Backwards in High Heels" (S2E11).
Simulation Glock 19
Bravo Team and the British SAS practice with simulation Glock 19s in "Backwards in High Heels" (S2E11). They appear to have a combination of all-blue and blue Glock 19 frames.
Glock 26
Rita Alfaro (Mirelly Taylor) can be seen using a Glock 26 pistol in "Santa Muerte" (S2E09).
Browning Hi-Power
Some opposing forces are armed with the Browning Hi-Power in parts of the season.
Beretta 92FS
Beretta 92FS pistols are seen used throughout the season. Colonel Francisco Martinez (Felix Solis) uses his Beretta in "Santa Muerte" (S2E09).
Beretta 92FS (Two-Tone)
A two-tone Beretta 92FS is used by El Lazo in "Parallax" (S2E08).
Beretta 93R
A Beretta 93R appears to be used by chief Doza Cartel propagandist Carlos Gonzalez (Pablo Cesar) in "Hold What You Got" (S2E06). A Brother of Islamic Jihad in the Levant terrorist also is armed with the 93R in "Backwards in High Heels" (S2E11).
CZ 75 Automatic
A CZ 75 Automatic is seen with a BIJ hijacker disguised as a civilian in "Backwards in High Heels" (S2E11).
M1911A1 (Gold-plated)
Fausto brandishes what appears to be a gold-plated M1911A1 in "Never Say Die" (S2E02).
M1911A1 (Nickel)
A nickel-plated M1911A1 is used by a sicario in "Outside the Wire" (S2E07). Andres Doza (Yul Vasquez) uses it in "Parallax" (S2E08) and is seen with him in "Prisoner's Dilemma" (S2E10).
Taurus PT92
A stainless Taurus PT92 pistol is used by a sicario in "Outside the Wire" (S2E07).
Walther PPK
What appears to be a stainless Walther PPK pistol is used by CIA operative Mandy Ellis (Jessica Paré) in "Santa Muerte" (S2E09).
Revolvers
Smith & Wesson Model 66
A snub-nosed Smith & Wesson Model 66 is seen on the ground in "Medicate and Isolate" (S2E19).
Submachine Guns
Beretta PM12
The Beretta PM12 is seen in "Hold What You Got" (S2E06) and "Prisoner's Dilemma" (S2E10) with Doza Cartel soldados. At least one is seen "Backwards in High Heels" (S2E11) with an OPFOR.
CZ Vz. 61 E Skorpion
A hijacker also is armed with a CZ Vz. 61 E Skorpion in "Backwards in High Heels" (S2E11).
Heckler & Koch MP7A1
The Heckler & Koch MP7A1 is another weapon used by the SEALs, but primarily used by EOD Specialist Summer Kairos (Ruffin Prentiss) in Season 2. Bravo Team uses the suppressed MP7A1 while on a black op in downtown Lahore in "Never Out of the Fight" (S2E23).
Heckler & Koch MP5A3
The Heckler & Koch MP5A3 is seen in the hands of a Indian National Security Guard commando in "All That Matters" (S2E04). One is seen with some Doza Cartel soldados in "Outside the Wire" (S2E07) and "Santa Muerte" (S2E09). Jason uses it in "Parallax" (S2E08) while undercover as a Merida Cartel soldado.
Heckler & Koch MP5K
The Heckler & Koch MP5K is seen in "Hold What You Got" (S2E06) and in "Prisoner's Dilemma" (S2E10) with Doza Cartel soldados. An OPFOR is seen with it in "Backwards in High Heels" (S2E11).
Heckler & Koch UMP
The Heckler & Koch UMP is seen in "Parallax" (S2E08) with Lopez during a raid as a Merida Cartel soldado.
IMI Uzi
The IMI Uzi is seen with some Doza Cartel soldados in "Hold What You Got" (S2E06) and "Outside the Wire" (S2E07). An Uzi with no stock is used by some Mexican Marines in "Parallax" (S2E08) while masquerading as Merida Cartel soldados.
IMI Micro Uzi
An IMI Micro Uzi is seen ironically with a BIJ hijacker near the end of "Backwards in High Heels" (S2E11).
Intratec TEC-9
The Intratec TEC-9 appears to be in "Hold What You Got" (S2E06) and in "Prisoner's Dilemma" (S2E10) with Doza Cartel soldados.
PM-63 RAK
The PM-63 RAK is seen in "Backwards in High Heels" (S2E11) with a BIJ terrorist.
Shotguns
Custom Shortened Remington 870
What appears to be a shortened Remington 870 shotgun used by Bravo Team during breaching ops.
Machine Guns
FN Mk 46 Mod 1
The FN Mk 46 Mod 1 is one of the machine guns used by SEAL members, mainly by Sonny Quinn (A.J. Buckley). It's outfitted with an Eotech XPS3, G33 magnifier, AN/PEQ-15, Grippod grip, flashlight and a Surefire SOCOM556-MG suppressor.
FN Mk 48 Mod 1
The FN Mk 48 Mod 1 is another machine gun used by Sonny for certain missions. It's outfitted with Elcan SpectreDR and a Magpul RVG grip.
The "D" model of the M240 machine gun is visible on the ramp of a Marine V-22 Osprey in "You Only Die Once" (S2E15). M240Ds are mounted as doorguns on the India Air Force UH-60 Blackhawk in "My Life For Yours" (S2E21).
M60E3
An M60E3 is mounted on Mexican Marine vehicles in "Hold What You Got" (S2E06) and in "Prisoner's Dilemma" (S2E10).
M61 Vulcan
What are supposed to be Royal Saudi Air Force F-16 Falcons armed with the M61 Vulcan are seen near the end of "Never Say Die" (S2E02). Some of these scenes appear to be stock footage and in reality, the RSAF does not use F-16s. USN F/A-18 Hornets with their M61 Vulcans are seen in "Never Out of the Fight" (S2E23).
M197 Vulcan
The M197 Vulcan is seen mounted on USMC AH-1Z Viper attack helicopters in "You Only Die Once" (S2E15).
GAU-8/A Avenger
The General Electric GAU-8/A Avenger cannon is seen as the main weapon on the A-10 Warthog ground attack plane that provides air support for the team in"Medicate and Isolate" (S2E19).
Dillon Aero Minigun
USMC UH-1Y Venom helicopters are armed with Dillon Aero-styled miniguns as doorguns in "You Only Die Once" (S2E15). Miniguns are also mounted on the Blackhawk providing air support for the team in"Medicate and Isolate" (S2E19).
Browning GAU-16/A
A Browning GAU-16/A is seen on the side of USMC UH-1Y Venom helicopters in "You Only Die Once" (S2E15).
Browning M2
The Browning M2HB is seen with American military vehicles and emplacements in the series. It's seen in "Prisoner's Dilemma" (S2E10) with Chipas State Police vehicles.
DShK
The DShK HMG is used by various factions in the show.
PKS Machine Gun
A PKS Machine Gun is mounted on an enemy technical in "You Only Live Twice" (S2E15).
Launchers
M72A9 LAW
The M72A9 LAW appears to be used by Bravo Team for anti-armor capabilities.
RPG-7
The RPG-7 is used by opposing forces throughout the season. The launcher is seen being used numerous times with the RPG warhead missing.
What appears to be an inert base of the yellow M18 smoke grenade is seen in Bravo Team's locker room "Backwards in High Heels" (S2E11).
M67 frag grenade
The M67 frag grenade is used by the SEALs as an offensive weapon.
AN/M8 HC smoke grenade
An AN/M8 HC smoke grenade is seen with Bravo Team when it's needed for non-lethal purposes.
Other
MON-50 antipersonnel mine
Summer discovers a rigged mine trap in "Never Say Die" (S2E02). Jason ID's the mine as a "Russian Claymore", which could be the MON-50 anti-personnel mine.