The G36 is a Tau'ri assault rifle used by Stargate Command and the Atlantis expedition. The rounds fired by those weapons are capable of piercing Jaffa, Ori Soldier and Wraith body armor, and enough of those weapons, as well as other types could also be capable of eventually piercing Vanir armor, and killing mutated hosts to interdimensional parasites. Those weapons can be found stored in such areas including Stargate Command, Atlantis, the Midway space station and onboard Daedalus-class vessels. (SG1: "Off the Grid", "Uninvited", SGA: "Midway", "First Contact", "The Lost Tribe", "The Prodigal")
The G36 is used by several members of the SG and Atlantis teams, including Col. Albert Reynolds of SG-3. The rifles at times replaced the widely used FN P90 Personal Defense Weapon, particularly to Lt. Col. Mitchell of SG-1, on such missions including the taking back of the missing Stargates from Ba'al, and stopping the interdimensional parasite, as well as Lt. Col. Sheppard of the Atlantis Reconnaissance 1, who used such a rifle to stop Koracen, the Vanir, and Michael Kenmore. In 2007, Colonel Samantha Carter used a matter converter to synthesize two of these weapons for Sheppard and Major Evan Lorne to use against the Wraith on board Aegis. In 2008, Teal'c and Ronon Dex armed themselves with these weapons during the Battle of Midway. The two used them extensively against the Wraith on the Midway Station and invading Stargate Command alongside a zat'nik'tel and Ronon's particle magnum. (SG1: "Off the Grid", "Uninvited", SGA: "Nightfall", "Midway", "Ghost in the Machine", "First Contact", "The Prodigal")
In 2009, several personnel of Icarus Base carried those weapons, which they took with them when they were forced to evacuate to Destiny. Some of those personnel include Ronald Greer and Matthew Scott. (SGU: "Air, Part 1", "Darkness")