Thread: B endorsement

Police range at Porirua was designed to have air be pumped through from behind the shooters and sucked in at the end behind the butts

If the inlet and outlet holes are evenly sized and distributed across their respective ends then the air flows in a manner called "plug flow" which has little turbulence but steady from behind the shooters and carries away any fumes and whatnot

Also was designed for use with frangible rounds FWIW

Dunno how well it worked in the end as I only saw it at the early stages but it's an idea

The snail trap looks really good