Pact of the Gun Warlock [5e]

warlock, pact of the gun. Your patron is just a gnome artificer thats real obsessed with you field testing his various creations, whether they armor, gun, or boom.
eldritch blast is just you, but with a .45. As you get more levels, you learn how to fire accurately despite recoil, so you get the multiple shots.
i now want to make this, but for real