A powered fastener driver comprising a housing, a nosepiece coupled to the housing and extending therefrom, a driver blade movable within the nosepiece between a ready position and a driven position, and a pusher mechanism coupled to the nosepiece for individually transferring collated fasteners in a canister magazine to a driver channel in the nosepiece in which the driver blade is movable. The pusher mechanism includes a feeder arm and a linkage positioned between the feeder arm and the driver blade. The feeder arm is engageable with individual fasteners in the nosepiece for sequentially pushing each of the fasteners into the driver channel in response to movement of the feeder arm toward the driver channel. The linkage is movable to advance the feeder arm toward the driver channel in response to contact with the driver blade as the driver blade moves from the driven position toward the ready position.