For World War II airsofters, reenactors and collectors, the AGM STEN MKII AEG is a good option and GM Tatico takes a look at one in this video. The AGM MkII STEN (AGM058) is a full metal, fully upgradeable AEG submachine gun, replicating the iconic WWII British STEN. Featuring a reinforced metal gearbox, detachable magazine, and FPS range of 300-350.