. >> reporter: dennis is the vice president of the bracy center to prevent gun violence. he says the little gun groups and the meetups mark a new challenge to gun control efforts, and to the nra. >> i think a lot of these pro-gun extremists sense that the politics of guns has changed. they sense that their time has come. >> reporter: is there tension between what the nra is trying to do and what the other groups are doing? >> well, there are two sides to the coin. on the one hand, i think these groups are actually willing to take the nra's rhetoric to its logical conclusion. on the other hand, when you have people who are openly carrying their guns into starbucks, it causes enormous concern among other people who are going into starbucks. it causes a backlash. >> reporter: starbucks was the target of a pressure campaign to allow customers to openly carry their weapons in states where it is legal to do so. that's 43 of the 50 states. starbucks ceo howard schultz told me earlier this year, he felt caught offguard by the movement and had to choice but to relent. >> we woke u