Based on this product's specifications, here are some alternatives and similar models
Nozzle GESIPA FireBird M6 model 1435068
Summary description:
Replacement M6 nozzle for the GESIPA FireBird series, model 1435068. This nozzle is designed to fit compatible FireBird fastening tools and provide precise rivet placement. Intended for professional and workshop use, it ensures correct alignment and consistent operation when installing M6 fasteners. Easy to install and replace.