Fastening device for weapon accessory

A fixing device (10) for fixing silencer (11) to a handgun, wherein the fixing device comprises:

• a fixation rail (30) for fixing the fixing device at a mounting rail (94) of the handgun, and
• a fixation plate (12) arranged at the front end of the fixation rail (30) extending perpendicular with respect to the fixation rail, wherein a shot channel (20) is formed in the fixation plate, which, with the fixing device fixed to the mounting rail (94), extends coaxially with respect to the central axis of the barrel of the gun, wherein
• the fixation plate (12) comprises a fixation means for fixing the silencer at the fixation plate (12),
• wherein the fixation means comprises a groove (12a) running at least partly circumferentially around the fixation plate (12), or a tongue of a tongue and groove connection running at least partly circumferentially around the fixation plate (12),
• wherein the groove (12a) or the tongue is formed such that a tongue or groove provided at the silencer can be brought into engagement with the groove (12a) or tongue of the fixation plate (12),
• wherein the groove (12a) or tongue of the fixation plate (12) is provided at least at two opposing side walls (16) of the fixation plate, wherein the silencer can be pushed on the fixation plate along the groove (12a) or the tongue,
• wherein a locking means is provided at the fixation plate (12) for locking the silencer fixed at the fixation plate, wherein the locking means comprises at least one hole (12c) provided at at least one side wall (16), which corresponds to e borehole (40) provided at the silencer, when the silencer is fixed to the fixation plate (12), wherein a safety bolt can be pushed through the hole (12c) and through the borehole (40).