SOP adapter set for Haw san Mad Max gas shotgun

GENERAL INFORMATIONS

New adapter set for shotgun with gas cartridge system
use the 870 metal gas carts by using this special adapter
insert the adapter and the collar into the shell for reliable and strong shot

included parts:

-2x aluminum shell extension
-2x aluminum shell collar

only for Haw San double barrel shotgun
ATTENTION! do not use with plastic shells