Verified working wonderfully for LCT HK33. I am the only one making a HK33 Drum adapter. 3d printed out of ultra high density carbon fiber filament. Very high quality print. Made for Angel Customs Firestorm drum. Drum is NOT INCLUDED. you are only buying the adapter piece. If you are interested in anything else 3d printed send me a message. I think I am the only person on Hopup offering carbon fiber polycarbonate 3d prints. Have a print job that needs true durability? Contact me today or visit my website/ e-shop to learn more. https://www.cedar3d.com/