The "Kamikaze XS Red Grenade" by Saigo Defense is an airsoft impact grenade that uses 9mm blank rounds for simulation purposes, not an item in the game Destiny 2. 
The item is designed for airsoft games, police, and military training, and is triggered by impact. It is compact, made of aluminum and steel, and is fully reusable with 9mm blank ammunition. 
While Destiny 2 features numerous grenade launchers and in-game grenades with various perks and rolls (e.g., Velocity Baton, Cataphract GL3), there is no official weapon or item in the game with the specific name "Saigo's Destiny," "Kamikaze XS," or "Red Grenade". In Destiny 2, a small red grenade icon may appear as a map indicator for certain quests or in-game elements, but it is not a collectible weapon.