If you're wanting to add a few guns to your sound library, you may want to consider pitching in a few dollars to this firearms Kickstarter. Even a pledge as low as $1 will get you access to the full sound library. At the time of writing, there's a few hours and a couple hundred left to go in this.
Yes, this isn't a question - but I thought this might actually be useful to a number of you here, so I'm posting it all the same. If this thing gets funded, it means we all get fairly cheap access to sounds that are expensive/dangerous/difficult to record. I checked the rules and I'm not 100% sure if this is kosher. If it isn't, feel free to let me know and close this thread.
UPDATE: The Kickstarter has finished and was successfully funded. Go us! ^^