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The SEALs in the series carry Heckler & Koch HK416 carbines with 10-inch barrels, Geissele HK416 handguard, Magpul PMags, Magpul CTR stock, EOTech XPS3, Magpul RVG and a suppressor. All the HK416 carbines are painted in dark earth camo.
Heckler & Koch HK416 (14.5" barrel)
Clay Spenser (Max Thieriot) carries a variant 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.
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 "Hold What You Got" (S2E06).
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).
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 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 uses it in "Parallax" (S2E08) while posing as a Merida Cartel soldado.
Pistols
Glock 17
Both suppressed and unsuppressed Glock 17 pistols are seen used by SEALs and other characters in the series.
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.
Beretta 93R
A Beretta 93R appears to be used by chief Doza Cartel propagandist Carlos Gonzalez (Pablo Cesar) in "Hold What You Got" (S2E06).
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).
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 is used by CIA operative Mandy Ellis (Jessica Paré) in "Santa Muerte" (S2E09).
Submachine Guns
Beretta PM12
The Beretta PM12 is seen in "Hold What You Got" (S2E06) with Doza Cartel soldados.
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.
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). 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) with a Doza Cartel soldado.
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.
Intratec TEC-9
The Intratec TEC-9 appears to be in "Hold What You Got" (S2E06) used by a Doza Cartel soldado.
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 Mm 46 Mod 1 is one of the machine guns used by SEAL members, mainly by Sonny Quinn (A.J. Buckley).
An M60E3 is mounted on Mexican Marine vehicles in "Hold What You Got" (S2E06).
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.
Browning M2
The Browning M2HB is seen with American military vehicles and emplacements in the series.
Rocket Launchers
RPG-7
The RPG-7 is used by bad guys throughout the season.
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.