The National Shooting Sports Foundation released their adjusted NICS data for May 2011 today. There was an 11.4% increase in NICS checks for May 2011 over May 2010. For the month, there were 696,947 checks as opposed to 625,763 for the prior May.
This is the 12th straight month with increases over the same month in the prior year.
NSSF adjust the NICS figures to account for states like Utah, Kentucky, and Iowa which use the NICS database for CCW application checks. Though there isn’t a direct correlation with firearms sales, NSSF says “the NSSF-adjusted NICS data provide a more accurate picture of current market conditions.”
The raw numbers can be found at the NICS website here.