Abstract: A pneumatic tool is provided with a magazine having an open feed end extending into the fastener's guide body, with a sacrificial anvil attached at the open feed end and easily removable when required because of wear. The fastener magazine also includes removable and adjustable side rails for adjusting the dimension to accommodate fasteners of different sizes. The fastener is provided with a feeder shoe having a pivotal finger which permits fasteners to be easily loaded underneath the feeder shoe and then drawn rearwardly to urge the fasteners across the open feed end of the magazine. The tool includes a pivotal front plate having a spring mechanism for reducing the risk of injury when the front plate opens as a result of a fastener jam.