It was selected as a standard issue weapon because it offered better armor-penetrating and killing power than the 9mm H&K MP5A3 submachine gun it replaced. Like other firearms, it is technologically primitive compared to Goa'uld, Wraith, and Ori weapons, but it is more than capable of piercing the armor worn by Jaffa, Ori soldiers, and Wraith warriors. According to Colonel Jack O'Neill, it is a weapon of war, designed to kill the enemy, and holds better offensive capabilities than the Staff weapon, which he said was designed primarily to intimidate. This is very true; the projectile weapons of the Tau'ri are among the most lethal encountered. Considered "primitive" mainly because they are not energy based, weapons like the P90, M16, and G36K are superior in combat against staff weapons due to their rapid firing rate and precision. They can easily penetrate the armor of a Jaffa, killing them. Even the M1911A1 and M9 Beretta pistols can keep a smaller group of Jaffa at bay for some time, and even kill them even when they are wearing armor. (SG1: "The Warrior") https://www.amazon.com/shop/omegaordained Check out my Awesome new Sci Fi Store!! Interested in helping this Channel grow? go here: https://www.patreon.com/Omegaordained