An automatic fastener driving tool with an automatic side-loading magazine can be automatically loaded with fasteners via a high-capacity automatic loading station. The tool and the magazine are moved proximal to the loading station. The magazine door is automatically opened, and the loading station pushes fasteners into the magazine. The magazine door is automatically closed, and the tool and the magazine are moved back to their original position.

A nail gun for repeatedly driving nails into a substrate includes a drive assembly having a longitudinal axis, a feed head assembly attached to the drive assembly and configured to provide the nails to an output segment, a hammer configured to reciprocate along the longitudinal axis of the drive assembly to drive the nails into the substrate, and a reservoir assembly configured to provide compressed air to the drive assembly to reciprocate the hammer and drive the nail into the substrate. A method drives nails into a substrate with the nail gun.