I have an MX8 O/U gun that has been rebuilt including a new locking block, blued receiver and iron, 32" with Briely thin wall chks and has an Allem P4 double release with internal selector. Has 6 chokes - SK - IC - LM - M - IM - F .-- Matching Ser # 52023 on receiver, iron and barrel. Trigger is newer. (( $3500 Delivered to your FFL in the Lower 48 )) Any questions please send a conv message for info and contact # -- Thanks Bob