The Heckler & Koch MP5 is a 9mm submachine gun introduced in the 1960s. Its roller-delayed blowback operating system produces low recoil and consistent accuracy, which contributed to its wide adoption by military, law enforcement, and special operations units worldwide. The MP5 is compact and light, well-suited to close-quarters work. Configuration options include retractable and fixed stocks, threaded barrels for suppressors, and accessory rails. Safety and charging handle controls are ambidextrous on most variants. The MP5 has served in counter-terrorism and close-protection roles and remains in production and active service.