Elemental magic vs modern firepower, when three Rifle Girl Mercenaries are summoned to a war torn, medieval world and imprisoned by a cruel noble who wants them to fight his wars. However, these battle-hardened ladies have the ability to SUMMON ANY WEAPON that they've ever used in combat: Heavy-Machine guns, grenades, swords, you name it.
So strap in for the Action and Drama as the Mercs-from-Earth go full metal jacket against tyrant Dukes and elemental magic armies in JayDirex's action packed isekai: I Summon Ballistics