Stargate SG-1 - Season 5
The following weapons were used in the fifth season of the television series Stargate SG-1:
The most common sidearm seen in used by the SG teams (although in real life, the M9 is the military designation for the Beretta, the prop weapons used in the show are most likely the civilian Beretta 92FS).
The Glock 17 appears used by Adrian Conrad's bodyguards in "Desperate Measures" (Season 5, Episode 11).
Mercenaries disguised as Russian soldiers use Makarov PMs in "Desperate Measures" (Season 5, Episode 11).
Smith & Wesson 5906
A number of Smith & Wesson 5906 pistols are seen in the episode "Wormhole X-Treme!" (Season 5, Episode 12) being used by the group of extraterrestrial humans led by Peter Tanner.
The SIG-Sauer P226 is used in the episode "Desperate Measures" (Season 5, Episode 11) by Major Carter and Harry Maybourne.
FN P90 Personal Defence Weapon
Seen as the primary weapon of SG-1 throughout this Season.
Heckler & Koch MP5A3
The Heckler & Koch MP5A3, almost exclusively equipped with the Surefire dedicated forend weaponlight, is the primary weapon used by all SG teams for the first few seasons. Then when the main cast and some supporting and extras switched to the P90, the MP5 became less common. Also seen in use by the Free Jaffa Nation later in the series. MP5 also makes a small comeback when we see them again in the hands of a special assault unit raiding a Trust compound. Throughout the series it is generally the case that for non firing scenes the actors carry airsoft replica MP5s with a Navy trigger group, whereas for firing scenes their weapons switch to real firearms with SEF trigger groups.
Notably seen in the fight against the Replicators of our galaxy in "Menace" (Season 5, Episode 19) in the hands of O'Neill (Richard Dean Anderson), Teal'c (Christopher Judge), George Hammond (Don S. Davis) and various Airmen.
USAS-12 Assault Shotgun
This assault shotgun is seen mostly in the episodes featuring the Replicators, but actually had its very first appearance in the first episode "Children of the Gods" (Season 1, Episode 1). The USAS-12 shotguns in SG1 are newer CQ versions with a modified carry handle, no front sight and shortened barrel (sometimes with a muzzle brake).
Diemaco C7/Olympic K4B
Seen used by Marines, and the security of Stargate Command. These are all Olympic Arms K4B rifles (same receiver style as the Colt Model 715/Diemaco C7), standing in for the M16A2.
GAU-5/A and GAU-5A/A
The GAU-5/A and GAU-5A/A were the USAF contract versions of the XM177 and XM177E2 "CAR-15" short assault rifle. The USAF Security forces used them until recently, however, most of the non firing GAU-5A/As seen in the show were simply XM177E2 "Airsoft guns". The actual GAU-5A/A carbines look like the XM177E2 but don't have forward Assist buttons.
The GAU-5 variants that appeared on the show seem to be a mix of full-auto converted Colt AR-15 SP1s and Olympic Arms K3Bs, all with chopped barrels and fake GAU-5 flash hiders installed. The converted AR-15 SP1s have the "slab-side" receiver, while the K3Bs are recognizable by their 715-style receiver (forward assist, brass deflector, A1-style rear sight) and "Stowaway" pistol grips.
Heckler & Koch SL8
A member of SG-15 can be seen armed with a Heckler & Koch SL8 in "2001" (Season 5, Episode 10), outfitted with a scope and bipod.
Usually seen carried by the Cheyenne Mountain guards in stock footage.
One of the primary weapons utilized by the Stargate teams. During later seasons they are rarely seen without any attachments, mostly being equipped with flashlights, Cobray flare launchers and laser aiming modules. A small side note for the interested reader: The lower handguard on the M4 has to be removed in order to accommodate underbarrel grenade launchers like the M203 or, in this case, the Cobray 37mm Launcher.
Used in "The Tomb" (Season 5, Episode 8), these are most likely Norinco Type 84 rifles modified with a Krinkov parts kit to resemble the actual AKS-74U, a practice not uncommon in movies and television shows. Further info on the discussion page.
These two guns were set up in the gate room but were never used in the 10 years the show ran for. The M2 was also used at the Alpha site in "Allegiance" (Season 6, Episode 9), but was - once again - not fired. The weapon was then seen in "Bad Guys" (Season 10, Episode 16), mounted on an APC used by the alien security forces. The only instance were the weapon saw actual combat was in "Forever in a Day" (Season 3, Episode 10), were it was mounted on a F.R.E.D. during the onslaught of Heru'ur's Jaffa.
Daewoo K3 (mocked up as M249)
Contrary to popular belief, there are no real FN Minimi or M249 light machine guns used in Stargate: SG1 or its sister show, Stargate: Atlantis. The light machine guns used by the SG teams are actually Korean-made Daewoo K3s that have been fitted with M249 Paratrooper-style stocks and shortened barrels. Some of the K3s seen on the show also have RIS rails and vertical grips similar to those seen on the Mk 46 Mod 0.
Cobray CM203 Flare Launcher
Seen attached to M4s and M16s. Prop wise, these were all Cobray 37mm flare launchers meant to mimic the appearance of an M203. What tips them off is the absence of a second trigger, the shape of the trigger guard, the lack of a step up in the receiver, and the cocking lever on the SIDE of the receiver.
Cobray CM79LF 37mm Launcher
O'Neill uses a CM79LF as a 40mm grenade launcher in "The Fifth Man" (Season 5, Episode 4) to shoot down a death glider.
M67 fragmentation grenade
Seen in "The Fifth Man" (Season 5, Episode 4).