Binary liquid propellant weapon

The binary liquid propellant weapon uses two liquids that are explosive when combined as the propellant. On their own, each liquid is flammable, but safe. Only when mixed are they dangerously explosive (binary agent) The weapon's magazine contains only the bullet, with no casings. These are loaded into the breach, and then fine sprays of the two liquids are injected into the chamber behind the bullet and ignited by a spark unit, similar to an internal combustion engine. The resulting explosion propels the bullet. Nothing needs to be ejected, but reloading uses canisters for the two liquids and a clip of rounds plus a new battery, and the spark unit must be cleaned regularly to stop it fouling. The ammunition of these weapons is very compact and can easily hold twice the amount, if not more so depending on the magazine. The Binary action also produces a big muzzle flash as the liquids ignite, and on autofire this is very noticeable, especially at night.