There is masta. Was testing it out on my fixer right now.
Can hit Reinforce Slugs, then pressing 2 can hit jarring burst, solid slug, neutronium slug, trigger happy and eat bullets all at once. Though the perks have to go through their activation like they would normally. Thing is, lets say you're able to land a spot in someone's defense, you can smash one button that's tied to all your perks and they will all land cause they are checked right then and there.