![:P](http://nerfhaven.com/forums/public/style_emoticons/default/laugh.gif)
And it's an elementary law, one that all of us take for granted, one without which nerfing, hidraulics, and God knows what else wouldn't exist.
But 'nuff of that. I just don't see what the big deal is. I mean... the pressure delta 'tween zero and 90 degrees F can be overlooked, it can be compensated by one or two more pumps. It's not like we're building Feinwerkbau grade airguns... it's freakin' foam...
Don't mind me, I guess I'm just too Eastern-European, doin' it the Russian way: build first and calculate later. ( And I wonder why there are more AK47s in the world than M4s ).
PS: I'm not a big fan of Automatik Kalashnikov.