H&K MP5A3 submachine gun

The MP5 submachine gun was the standard issue submachine gun used by the SGC for the first four years of the program. Jack O'Neill and Samantha Carter also used it as their standard main firearms during those years, while Daniel Jackson used a M9 Beretta pistol, and Teal'c employed the staff weapon and zat. Though primitive compared to Goa'uld weapons, they were more than capable of piercing Jaffa armor, after a few shots. It was replaced by the P-90 after the mission to P3X-888