Staple gun capable of utilizing multiple staple sizes

A manually operated staple gun configured to carry a collation of staples and sequentially drive each of the staples of the collation in response to user actuation of the staple gun, the staple gun capable of utilizing staples having different widths, the widths defined by a pair of spaced legs on each staple, the staple gun comprising:

• a frame;
• a staple magazine in the frame selectively configurable to receive a first collation of staples having a first width and a second collation of staples having a second width, the second width being greater than the first width;
• a user-actuated staple guide having a first pair of longitudinally extending guide surfaces to guide staples of the first width along a guide axis into a ready position to be driven into a work piece, the staple guide being mounted in the frame to move between a guiding position wherein the guide surfaces guide staples of the first width along the guide axis and a stowed position wherein the guide surfaces do not guide staple along the guide axis;
• and
• a second pair of longitudinally extending guide surfaces to guide staples of the second width along the guide axis into the ready position to be driven into a work piece with the staple guide in the stowed position.