A visor assembly for use with a helmet having at least one face mask bar comprises a visor and a mounting bracket. The visor is configured to provide a shield associated with the face mask bar. The mounting bracket is configured to secure the visor to the face mask bar. The mounting bracket includes a clip and a thumbscrew removably connected to the clip. The clip defines a channel configured to receive the face mask bar. A threaded receptacle is positioned on the clip. The thumbscrew includes a threaded post connected to a thumbwheel. The threaded post is configured to threadedly engage the receptacle of the clip and releasably retain the thumbscrew on the clip. The threaded post of the thumbscrew is configured to extend through a hole of the visor and into the receptacle. When the thumbwheel is rotated, the thumbwheel clamps the visor between the thumbwheel and the mounting bracket.