Belgian BEM 4GP Respirator

Belgian BEM 4GP combat respirator designed for the Belgian army during the 1990s. Avon undercut the costs for producing this mask and the Belgian army then adopted Avon series masks such as the FM12.
The 4GP is one of the best masks on the surplus market and has now been issued to many countries riot police and is also available for civilian purchase.
The mask allows you to switch the position of the filter, by default it is straight down but it can be switched to either the left or the right depending on helmet shape and if the shooter is left or right handed.

French M51 Respirator

French M51 Respirator by ANP, this is the Belgian export model.
The M51 was an early Cold War respirator that took 40mm filters and had a basic voice diaphragm built in the exhale valve.