It seems the Better Business Bureau does not rate them very highly as a charity.
http://www.bbb.org/charity-reviews/nati ... #taxStatus" onclick="window.open(this.href);return false;
"BBB Wise Giving Alliance Comments"
"Brady Center to Prevent Gun Violence (Brady Center) does not meet the following 6 Standards for Charity Accountability." (one of which is)
"Brady Center does not meet this Standard because the organization's website, http://www.bradycenter.org" onclick="window.open(this.href);return false;, does not include all of the recommended information for those charity websites that solicit for donations. Specifically, it does not include: Electronic access to the organization’s most recent IRS Form 990"

