The Armalite AR-7 is a semiautomatic .22 LR detachable rifle originally developed for the USAF as a lightweight survival rifle. The receiver assembly and barrel can be contained in the buttstock and will float on water,though it is not waterproof.
The receiver and magazine is made of aluminum. It has had various manufacturers since the 60's. It is still in production and has been marketed as a survival/backpack gun due to it's compact size when broken down and it's light weight.
The Armalite AR-7 can be seen in the following films, television series, and anime used by the following actors:
