sawblade

there a sawblade v model swep i downloaded put it in my folder but i dont know how to use it. it shows a w model in weapons but cant find a way to use it
Link: http://www.garrysmod.org/downloads/?a=view&id=39115

I think thats for gmod9, looking at the map.

where do you get gmod9

I would suggest sticking with Gmod 10. Garry will actually support it.