
The AC18DA allows for toolless piston replacement where it can be detached from the plunger rod by unscrewing the piston counter-clockwise and then attached by screwing the piston in a clockwise direction. The caulking gun is able to be placed upside down while working thanks to the protrusion on the top of the main body and the rack handle to make it easier to unload and load caulking sausages. The piston retracts slightly to prevent the remaining sealing material at the end of the nozzle from dripping.
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