The Blanch-Chevallier Grenade Discharger was an experimental grenade launcher built upon the receiver and stock of a Martini-Henry rifle. It was designed by Arnold Louis Chevallier, a British mechanical engineer and explosives expert, and built by J. Blanch & Son of England.
Replacing the rifle's barrel is a 2.5" bore heavy barrel, with an internal dampening piston allowing for fire from the shoulder (unlike Rifle Grenade systems intended to be braced against the ground). A .450 caliber blank cartridge was used to project a proprietary grenade comparable to the standard Mk. 36 Mills Bomb.
— Weapon description
The grenade fired from the weapon inflicts major damage against infantry, and will explode on impact. The user may receive self-damage from grenades exploding at close range, and self-suppression a short distance further away.
When reloading the weapon, the user ejects the spent cartridge from the breech before inserting a rifle grenade into the muzzle, and loading a new blank.