This deluxe screwdriver set has just about every bit needed to work on any gun.  It features specialty tools to help with dis-assembly and hollow ground flat bits specifically designed to match the thin slots in gun screws.  This 89-Piece Set includes a hinged storage box, 2 handles, 3" shaft extension, hex to square drive adapter, 54 hollow-ground flat bits, 8 Allen bits, 4 Phillips bits and 3 Torx bits.