The AP51 PDW Pistol is chambered in 7.62x51mm and utilizes a semi-automatic, roller-lock delayed blowback action. The AP51 is equipped with a Navy style assembly with an ambidextrous selector, MP5 compatible wide handguard, standard G3 trigger set-up and bird cage style flash hider. Tested to NATO environmental standards for salt, fog, humidity, hot/cold, sand and dust. Includes two 20rd magazine.