patents Firearm with forward charging system Patent number: 10,352,635, B2 Patent number: US D893,659 S Bolt hold open mechanism system and method of using it Patent number: 10,180,298 B2 Firearm with spare magazine storage facility Patent number: 10415909 9MM & 45 Bold carrier Patent number: US D893,658 S Rear charging upper Patent number: US D894,313 S