The MAC-11 is a .380 chambered MAC-10, which is a highly compact, blowback operated machine pistol developed by Gordon B. Ingram in 1964. Production started on the MAC10 in the 1970s and continues today. Since the introduction of the MAC-10, other companies and countries have adopted the model and have either manufactured exact copies or slightly modified clones of the MAC-10. The MAC-10 and its variants never found widespread military success however, were adopted by some special forces units and police units in USA as well as some other countries. The weapon has been utilized as a building sweep instrument as well as a reliable defensive firearm. Israeli commandos have used MAC-10s during missions in which they needed to recapture a hijacked aircraft; due to the MAC-10s great firepower and low probability of over-penetration/ricochets.