Patent ID: 7021511

Claim:
A fastener driving tool, comprising: a tool body having an axis; a piston guided along said axis within said tool body for driving fasteners; a muzzle having a wall, and extending forwardly in the axial direction from said tool body, said muzzle being displaceable into a ready-to-fire position; a magazine for holding said fasteners and having an end coupled to said muzzle; said muzzle wall having an opening, there being a stop at said opening; a follower located in said magazine, and arranged to bias said fasteners through said magazine into said muzzle; wherein said follower has a blocking surface and at least a portion of said follower penetrates said opening in said muzzle wall when said magazine is in a fastener-empty condition, and wherein said stop of said muzzle wall contacts said blocking surface to prevent said muzzle from being displaced into said ready-to-fire position.