A fastener driving device (10) comprising a magazine assembly (54) including a rearward nosepiece portion (58) cooperable with a fixed forward nosepiece portion (60) to define a fastener guiding portion of a fastener drive track (30) of the device. A spring biased releasable latch assembly (56) is manually movable between 1. a normal operating position resiliently biasing the magazine assembly into the normal operating position thereof enabling the rearward nosepiece portion of said magazine assembly in cooperating relation with the forward nosepiece portion to be yieldingly moved therefrom, 2. an intermediate position wherein the magazine assembly is resilient retained against movement beyond the intermediate position thereof to enable jammed fasteners to be removed from between the spaced apart rearward and forward nosepiece portions and 3. a separating position enabling the magazine assembly to be freely moved beyond the intermediate position into separated relation with respect to the frame structure.