The MP5 is a submachine gun designed by the German company Heckler & Koch in the 1960s. It is known for its compact size, lightweight design, and high rate of fire, making it popular among military and law enforcement agencies worldwide. The MP5 fires 9mm ammunition and features a blowback operation, which contributes to its reliability and accuracy. Since its introduction, the MP5 has been used in various roles, including close-quarters combat and counter-terrorism operations. Its versatility has led to numerous variants and adaptations, including models with suppressors and different firing modes. The MP5 remains a prominent firearm in modern tactical operations.