The Purge is a 2013 horror/thriller set in a future United States where the government has granted one 12 hour period during the year where all crimes are legal. Ethan Hawke stars as a security systems salesman whose family is put in danger when their home is threatened by those participating in the Purge. The sequel, The Purge: Anarchy, was released in 2014.
The following weapons were used in the film The Purge:
Henry (Tony Oller) uses a IJ-70 when he tries to kill James. The "Bloody Stranger" later uses it to defend himself from the Purgers breaking into the house.
Kimber Warrior
After giving his Raging Bull to his son, James Sandin (Ethan Hawke) switches his sidearm to a Kimber Warrior.
Ruger KP95
A Ruger KP95 with a stainless slide is also seen in Ethan's safe. Mary Sandin (Lena Headey) later takes it when she goes to look for her daughter.
SIG-Sauer P226
When the Purgers break into the house, Mary trades her Ruger SR9 for a SIG-Sauer P226.
Smith & Wesson 915
One of the Purgers and the "Bloody Stranger" (Edwin Hodge) carry what appear to be Smith & Wesson 915s.
Taurus PT92AFS
When the Purgers break into the house, Mary arms herself with a stainless Taurus PT92AFS.
James also keeps a snub-nosed Taurus Raging Bull in his safe and keeps it on him until he gives it to his son Charlie when he sends him to hide in the basement.
Intratec TEC-DC9
In the "Behind the Scenes" footage, a Purger is seen with an Intratec TEC-DC9.
Shotguns
Ithaca 37
One of the Neighbors uses an Ithaca 37 with an extended magazine tube.
Two of the Purgers use a Colt M16A2. One of the M16A2s appears to have the handguard of an M249 SAW. This variant is only seen briefly in dark shots and the only clear shot of it is seen in "Behind the Scenes" footage.
Unknown Rifle
One of the Neighbors uses an Unknown Rifle.
Miscellaneous Firearms
Purge feed footage in the introduction show Purgers with various handguns, shotguns, and assault rifles. However, the low quality of the footage make these firearms near impossible to identify. It is very likely that these scenes recycle weapons from the above-mentioned.