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The following weapons were used in Season 3 of the series Falling Skies:
Colt M4A1 carbines can be seen carried by resistance fighters throughout Season 3. These rifles are seen with and without red dot sights, RIS foregrips and grenade launchers. The resistance fighters who carry the rifle include Maggie (Sarah Carter). M4A1's are also carried by soldiers guarding President Hathaway in "At All Costs" (S3E04).
M16A2 rifles are carried by several of Resistance fighters and Charleston soldiers.
M16A2 (Modified)
Several M16A2 rifles are seen modified by the Volm, the humans' new allies, to use against Mechs. Both Tom and the Volm alien nicknamed "Cochise" (Doug Jones) are also seen with the rifle in "On Thin Ice" (S3E01).
The Heckler & Koch G36K rifle fitted with a foregrip continues to be the weapon carried by Ben Mason (Connor Jessup) in Season 3. In this season, Ben's G36K is fitted with a Magpul AFG1 foregrip (whereas it was previously fitted with a KAC vertical grip in Season 2).
SIG SG 552 Carbine
Colonel Dan Weaver (Will Patton) continues to carry the SIG SG 552 carbine as his preferred weapon.
Zastava M70
Tom Mason (Noah Wyle) continues to carry a Zastava M70, as noted by the three vent holes in the handguard, grenade sight, and black pistol grip.
Hal Mason (Drew Roy) continues to carry aGalil SAR as his preferred weapon.
CZ 805 BREN A2
In Season 3, the CZ 805 BREN A2 begins appearing in the hands of resistance soldiers. The version seen on the show is the two-tone version with the tan upper receiver. This appears to be the first-ever appearance of the CZ 805 on a television show.
In Season 3's premiere "On Thin Ice" (S3E01), Hal Mason (Drew Roy) is seen manning dual DShK heavy machine guns mounted atop a humvee.
Submachine Guns
Beretta M12
Crazy Lee (Luciana Carro), one of Pope's "Berserkers", carries a Beretta M12 as her weapon of choice.
Heckler & Koch MP7A1
The personal bodyguards of President Hathaway (Stephen Collins) carries thr Heckler & Koch MP7A1 in "At All Costs" (S3E04).
Heckler & Koch UMP
The Heckler & Koch UMP is seen in the hands of Lyle (Brad Kelly), one of Pope's "Berserkers". Another Berserker was also seen using one along side Lyle, both equipped with EOtech sights.