Galaxys G6 pistols are all 1911 handgun airsoft replicas, and they accept this 17-round magazine. Because these pistols are spring-powered copies, they dont fire in semi-auto mode. You need to cock them before each shot.
However, the larger magazine capacity of 17 BBs increases shooting time. This magazine is made of polymer and resembles a double-stack 1911 magazine in almost every way. It can stay in your magazine pouch until ready to be used.
Remember not to use this magazine in any other weapon other than the Galaxy G6 series. It might not fit and function and forced use may result in permanent damage to the airsoft pistol.