Inception is a 2010 science fiction thriller from director Christopher Nolan (The Dark Knight) and starring Leonardo DiCaprio as a specialist in infiltrating people's dreams and stealing their deepest secrets.
The following weapons were used in the film Inception:
Cobb (Leonardo DiCaprio) carries throughout the film a Beretta Px4 Storm with a threaded barrel, chambered in .45 ACP. He's also seen using it with a suppressor.
SIG-Sauer P232
A SIG-Sauer P232 is used by Mal (Marion Cotillard) to injure Arthur during the opening dream. She also appears to use it briefly on the third dream level.
Walther PPK
Saito (Ken Watanabe) is seen pulling a Walther PPK when he awakes from the opening dream. Cobb is later seen holding it.
Beretta 92FS
At least one of the men chasing Cobb had a Beretta 92FS. Also seen in Arthur's dream (hotel).
Beretta 92SB
A Beretta 92SB is picked up by Robert Fischer Jr. (Cillian Murphy) in the hotel dream, taken from a downed subconscious security guard.
Glock 17
A Glock 17 is used by Arthur (Joseph Gordon-Levitt) in the first and second dream levels. A subconscious guard chasing Cobb's team on a highway bridge is also seen firing a Glock.
Heckler & Koch USP Compact
Eames (Tom Hardy) carries the H&K USP Compact during the downtown dream. It is seen quite clearly in a close up, at the warehouse.
Browning BDM
A Browning BDM is pulled by Saito on the first level (Downtown). In a few shots on the third dream level, he is seen holding one.
Vektor CP1
A Black Vektor CP1 is used by Saito on the third dream level (Fischer's Winter Fortress). Oddly, he is seen handling his Browning BDM in a few shots before Eames hands him the CP1.
SIG-Sauer P226
A SIG-Sauer P226 is used by Fischer in the third dream level (Fischer's Winter Fortress).
Smith & Wesson Model 19
One of the men on the motorcycles that chases Cobb's team is armed with a Smith & Wesson Model 19.
SIG-Sauer P239
Yusuf (Dileep Rao) uses a SIG-Sauer P239 with a stainless slide while shooting it out on the bridge.
SIG-Sauer P228
SIG-Sauer P228s are used by some of the Cobol Engineering guards chasing Cobb in Mombasa.
A Japanese security guard (Tohoru Masamune) in the film's opening carries a C1A1 rifle (the Canadian L1A1) with wooden handguards. The choice of the C1A1 is interesting since the Japanese Guard is not carrying any sort of Japanese rifle.
M4A1 Carbine
Fischer's various subconsious private security men or "dream mercenaries" are armed with M4A1 carbines.
FN SCAR-L
The FN SCAR-L with an ACOG scope is used by Arthur (Joseph Gordon-Levitt) to engage some of Fischer's dream snipers before he is interrupted by Eames (Tom Hardy).
SIG SG 552
A winter camouflaged SIG SG 552 is used by Eames during the snowy mission. Its stock and handguard are wrapped in cloth, and it appears to have a rail on the top of the receiver.
Norinco QBZ-97
In the third level (Winter Fortress), a guard is briefly seen with a Norinco QBZ-97 rifle.
Fischer's subconscious sniper is seen attacking Cobb's group with a Heckler & Koch G3SG/1 and later folds out the bipod before being shot down by Arthur's FN SCAR-L
Machine Guns
M240B Machine Gun
A guard aboard a Humvee fires a mounted M240B while chasing Eames in the Winter Fortress dream before getting wiped out by Eames' bomb.
Other
M26 Hand Grenade
Saito uses a M26 hand grenade (painted white) to ward off attackers during the winter scene. The grenade then explodes into flames, which is not possible as frag grenades explode into fragments and only incendiary grenades burst into flames.
Milkor MGL
The Milkor MGL is used by Eames (Tom Hardy) to take out the last warehouse attacker in the first level (City).
Heckler & Koch P2A1
A Heckler & Koch P2A1 Flare Pistol is used by Eames to draw the guards away from the fortress in the third level (Winter Fortress).