Autoloader

An autoloader or auto-loader is a mechanical aid or replacement for the personnel that load ordnance into crew-served weapons, such as tanks and artillery. The term is generally only applied to larger weapons that would otherwise have a dedicated person or persons loading them. Semi-automatic firearms are sometimes informally called "auto-loaders". However, this is a derivation of the term "auto-loading" rather than a physical "autoloader", as discussed here.