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Beretta 92FS pistols, standing in for M9s, are used by the soldiers stationed at Camp Humphreys in South Korea, including Captain Speke (James Badge Dale). A U.S. Navy SEAL who escorts Gerry Lane (Brad Pitt) to the base is seen firing a suppressed Beretta 92FS at the zombies.
Glock 17
A Philadelphia police officer is seen with a 2nd Generation Glock 17 in a promo screenshot. A man who helps Gerry in a looted Newark grocery store is also seen wielding a Glock. Gerry and Dr. Fassbach (Elyes Gabel) use Glocks after landing at Camp Humphreys in South Korea. Segen (Daniella Ketesz) later uses a Glock at the WHO lab in Cardiff, which is given to her by one of the WHO doctors as a last resort. A 3rd Generation model is also used by Gerry while aboard the Antonov An-12.
Jericho 941F
Segen uses her service Jericho 941F on the Belarus Airways plane to kill some zombies before running out of ammo.
Rifles
M16A2
Pennsylvania National Guardsmen, U.S. Marines and Israeli soldiers can be seen with the M16A2 rifle.
M4A1 Carbine
U.S. military personnel including Special Forces, SEALs and U.S. Marines can be seen with M4A1 carbines throughout the film. The U.S. Army Rangers including Captain Speke (James Badge Dale) that Gerry meets at a base in South Korea are armed with suppressed M4A1s.
Custom CAR-15 variant
Gerry's IDF escort Segen and several other soldiers use AR-15 carbines with A2 upper receivers and 10" barrels with XM177-style muzzle brakes. Similar composite carbines appeared in Blood Diamond and Black Hawk Down.
CTAR-21
One of Gerry's IDF escorts is armed with a Tavor CTAR-21 assault rifle.
AKS-47
Soldiers of the Palestinian Security Forces were armed with AKS-47 rifles.
Remington Model 700 BDL
Gerry uses a Remington Model 700 that he finds in a commandeered RV while fleeing from Philadelphia to Newark. He tapes a kitchen knife to the barrel as a makeshift bayonet.
Machine Guns
FN Minimi
A standard-length FN Minimi is used by a helicopter-borne USAF parajumper sent to rescue Gerry and his family. This machine gun is fitted with a 200-round cloth ammo bag and was likely used as a substitute for the Mk 46 Mod 0.
FN Minmi Para
A FN Minimi Para can be seen being fired by an Israeli soldier with a 200 round cloth ammo bag, standing in for the IMI Negev.
M240D
The M240D machine guns are seen mounted on IDF helicopters.
Browning M2HB
Browning M2HB heavy machine guns can be seen on Pennsylvania Army National Guardsmen HMMWVs in the trailer.
Hand Grenade
M67 Hand Grenade
IDF soldiers use M67 hand grenades while battling the zombies. Gerry also uses Segen's grenade on board the Belarus Airways plane when it becomes overrun by the infected.
Heavy Weapons
Mk 19 grenade launcher
A Mk 19 grenade launcher can be seen mounted on a HMMWV as a civilian RV runs a military road block. MK 19s can also be seen mounted on IDF HMMWVs.
GAU-8/A Avenger
American A-10 Thunderbolt II ground attack aircraft can be seen in the trailer. These carry internally-mounted General Electric GAU-8/A Avenger rotary cannons under the nose.
Trivia
In the US, trailers approved for "Appropriate Audiences" are not allowed to show people brandishing weapons at other people in the same shot, even if the people are undead zombies. Thus, Israeli soldiers' rifles were digitally replaced with walkie-talkies for these scenes in the previews.