The Walther A115 is a prototype German semi-automatic rifle.
The A115 was a prototype rifle developed by Walther. It never took off and the design evolved into the MkB 42(W). Only three rifles were reportedly made; two are known to exist, with one being in the Bundeswehr Military History Museum.
The rifle is composed of 3 different parts stuck together using rivets or pins. The rifle uses an odd annular gas piston with a rotating bolt. The receiver is made of stamped steel.