They have safety mechanisms that can be removed or damaged. Usually one shot per pull OR depression of the gun tip. Some framing guns are made to do double shots. To put one in perspective my biggest framing gun can bury a 3.5 in nail in concrete.
Just curious - is that an air gun or a butane gun? (for concrete)
Never used an air gun for driving concrete nails - only the “.22” powered single shot or the big Paslode butane powered framer.
Just curious. THanks