Model B 13mm Gyrojet Pistol & Ammo FFL. a pistol with rocket ammo. : r/WeirdWeapons
Collectible Firearms for Serious Gun Collectors | Rock Island Auction
Gyrojet - Wikipedia
Would gyrojet bullets with 2 grains of tnt as a propellant inside the bullet and a case of powder to get more velocity be viable? Besides for cost, would it have any