Stargate Universe is the second television spin-off of the series Stargate SG-1. The series followed a present day crew of explorers and soldiers travelling aboard an ancient starship when they find themselves flung far beyond the reaches of the Milky Way with no way to get home. The series aired in the US for two seasons from 2009 to 2011.
The following weapons were used in the television series Stargate Universe:
Heckler & Koch UMP
A Heckler & Koch UMP is seen in the hands of Colonel Everett Young (Louis Ferreira) during the attack on Icarus base. In Episode 6 Water, 1st Lt. Matthew Scott (Brian J. Smith) used Young's UMP to shoot at ice to harvest for water. The weird part is the sound effect they use when fired is the P90. According to the video on the discussion page, the weapon is confirmed to be an UMP .45 due to the armorer saying it carries a 27 round magazine.
Heckler & Koch G36K
Lieutenant Matthew Scott (Brian J. Smith) and Greer are seen using the H&K G36K, and sometimes switches between dual and single optics. So far this is the most visible weapon in all the trailers and promos in the hands of all other military personnel so far aside from the M4. These could be the new primary weapons used in the series. They all appear to only have the Export Optical sights. Colonel Young later on used one as a crutch.
What appears to be M4A1s are in the hands of the other military personnel aside from G36Ks. The M4s seen on the show have included a mix of genuine Colt M4A1s and Olympic Arms K3B-FTs (recognizable by their tall flattop receivers and "Stowaway" pistol grips).
The Beretta 92FS are seen in the hands and holsters of Lieutenant Scott, Lieutenant Johansen and Sergeant Greer
A Para-Ordnance P-14 is used by Colonel Young seen clearly in a production still for Episode 12 of season 1. Presumably the same gun used by Joe Flanigan in Stargate Atlantis since the same armorers are used for Universe.
Seen in the first episode of the series and again misused as an anti-air missile launcher.
Browning M2HB Heavy Machine Gun
A Browning M2HB heavy machine gun was seen defending Icarus base from the Lucian Alliance.
As we've seen in Stargate SG-1, the Lucian Alliance also uses the Kimel AP-9 pistols. We see them in episode 19.
The standard assault rifle of the Lucian Alliance that appeared in episode 19.
Custom M1911 Pistol
Kiva gives Telford a sidearm that appears to be a custom made 1911. It looks to have a grip that same consistency as that of a Strayer Voigt Infinity 1911. This pistol appears to have the futuristic frame usually seen on "Timecop Beretta" pistols frequently used on the other Stargate SG-1 series.
AKS-74U were seen among the primary weapons of the Langarans.
Lt. Scott impersonating a Langaran Captain, drew a Walther P38
What appears to be a Gatling Gun as a mounted weapon in episode 15 of season 2.
A cosmetically-modified version of this submachinegun was seen in episode 15 of season 2. It was previously seen in another SyFy Channel production, Caprica.