Hi guys I recently purchased a logun mk 2 whilst out shooting I let it run a little to low and as I released a shot it sounded as if it dumped all it's air , when refilling it back at home it doesn't seem to be holding any air , it just seems to be rushing out of the end of the barrel and out of the bolt housing , I was just wondering have the seals gone or am I refilling it wrong , any advice would be great .