Abstract: A magazine for a compressed-air nail firing tool, comprising a fastener guiding channel which is delimited laterally by a pair of flat and parallel walls, wherein one of the walls is fixed to the body of the firing tool, while the other wall is constituted by an access flap which is hinged to the fixed wall about a longitudinal axis, so as to allow lateral opening of the fastener guiding channel over at least a significant part of its length, elements being further provided for retaining the access flap in the position for closing the fastener guiding channel.