The SP5 was developed by Heckler & Koch as a semiautomatic, civilian sporting pistol that matches the look and feel of the legendary MP5 submachine gun. Designed and manufactured to meet the definition of a civilian pistol, the SP5 is loaded with authentic features, like a Navy barrel with threaded tri-lug adaptor, paddle magazine release, and fluted chamber. The backbone of the pistol is the roller-delayed blowback operating system, which is legendary for its accuracy, reliability, and smooth shooting dynamic. It retains many of the critical elements of the MP5, including its precision-machined components and attention to detail.