The Beretta 92FS is the standard sidearm of Colonel Jack O'Neil (Kurt Russell). The pistol is seen both at his house where his son died and as his sidearm on the planet. Also seen in the hands of the other USAF team members as well as Dr. Daniel Jackson (James Spader). Beretta 92FS pistols were also used by the teenage rebels on Abydos, especially during their battle with Ra's forces.
Glock 17
In the Special Edition of Stargate, Lt. Kawalsky (John Diehl) is seen pulling a Glock 17 on the people of Abydos when the residents of the city closed the city doors before the sandstorm hit.
M16A1
M16A1 rifles are carried by the USAF guards in the Stargate Command Center.
M16A1 with A2 handguards
Heckler & Koch HK94A2
The majority of Col. O'Neil's team are armed with 9mm Heckler & Koch HK94s chopped and converted to resemble MP5A2s. Some are fitted with scopes and the tactical flashlight in the foregrip and some with plain wide forearms. The same HK94s were also used by the rebelling people of Abydos (namely Skaara (Alexis Cruz) and a band of teenage rebels) later in the movie when they fight Ra's forces.
Heckler & Koch HK94A3
Some members of Col. O'Neil's team (most notably Senior Airman Brown) are armed with 9mm Heckler & Koch HK94's chopped and converted to resemble MP5A3.
Heckler & Koch SR9TC
Lt. Kawalsky (John Diehl) can be seen carrying the Heckler & Koch SR9TC, outfitted with the HK91 wide forearm. (Note: while John Diehl is officially credited as "Lieutenant Kawalsky," he wears a Lieutenant Colonel's insignia throughout the film.)