Reloadable hardware of any size, from low power to high power. The motor hardware alone can be purchased by anyone, there is no need to have an high power certification. These motors are made by an aluminium casing and some closures. They use safety reloads specifically made for hobby rockets.
Aerotech RMS 24/40 reloadable motor hardware set. Includes the casing, one forward closure and one aft closure. This motor is an ideal choice to give more power to rockets made for 24 mm motors like Estes D-type, or as your first reloadable.