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					Originally Posted by  Beest
					 
				 
				i know a guy who swore by inflating his truck tires with CO2 ( fire extinguishers with the horn are CO2) 
 
To attach an extinguisher would require the proper connection so it's already been modified, could be an expired exinguisher with a couple of hundred pounds of pressurized air in it  (from a shop compressor). I have a couple of expired extinguishers a testing company gave me, to make air cannons ( like a t shirt cannon). 
Still if you have a supply of compressed air at home,, why do you need to carry some around? 
			
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 Oh good lord.... I haven't found this stuff yet..... 

 (although I do(kinda)  know where the paintball/nerf grenade launcher he made from one is....