The AP53 is based on iconic HK53 developed by Heckler & Koch for Germany and their allies during the Cold War. The AP53 is chambered in 5.56x45mm and utilizes a roller-lock delayed blowback action once renowned for its light weight and simplicity. The AP53 is equipped with a Navy style assembly consisting of an ambidextrous safety selector, MP5-compatible wide handguard, standard HK 33 trigger set-up and bird cage style flash hider to give it a classic Cold War look. This model features an all black finish and includes two 30-round HK 33 pattern magazines.