40mm Reloadable cases 4 pack
machined for mil spec 6061 T6 aluminum
uses shotgun primers
40x46mm same size are real m203 cases
good for at least 100 reloads
sold in 4 packs
item listed in the case on the far right in photo
https://sjhardware.com/product/40mm-reloadable-cases/
Attachment 271188