c.j. grissom, gun advocate and founder of open carry texas.came to dallas to pay his respects. >> it's good to see that we can still come together when we recognize that what happened should not have happened, regardless. >> reporter: his group an eclectic mix of gun enthusiasts who pack heat in public. >> my ability to carry a rifle in self-defense should never be infringed upon. a ak-15, a derringer, it doesn't matter, the second amendment is a self-defense tool. >> reporter: in a city still on edge the sight of exposed guns causing fear and concern. >> it feels unnecessary to me. like concealed i understand. but that is just excessive. i don't understand the point. >> reporter: texas is an open carry state. and walking around like this is legal. in the last few days their actions have drawn criticism. >> they will make an issue out of it, flip you off. >> reporter: here at last week's black lives matter rally, 20 to 30 men were seen with rifles strapped to their backs, wearing gas masks and bullet-proof vests quhr shots were fired, confusio