I have an Type 4 MX8 32" O/U barrel with fixed chokes. Previous owner said Eyster worked this barrel but did not stamp it. Top 30th and Bottom 20th. Ser # 55075 . ( $2800 Delivered to your address in the Lower 48 ) Will trade for a 30" MX3 Special barrel or an MX 30" type 4 with chokes and will pay some money difference for the factory choked barrel Any questions please send a conv message for info and contact # - Thanks Bob