It takes two hands to hold a gun and a knife. It takes one bad ass hand to hold a Gun-Knife!
Enter the Gunknife a lethal weapon for distance and hand to hand combat. Ever since the first gun was invented someone was designing a way to attach a blade to it. Rifles in war have had knives and swords attached to them so when you run out of bullets or just feel like stabbing the shit outta your enemy you have that option with the same weapon.
You can find many gun blade hybrid weapons for sale online but be careful because many designs like this are just replicas or fantasy weapons. Did a local search for such an item and came up blank on working models but a flood of fantasy weapons are available and cheap.
Above: the glock with a weak looking blade attached to it. Nothing more than a gimmick.
above: replica of an actual weapon found in sunken pirate ship in the ocean.