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Hatsan 12ga Shotguns

Interchanges with Carlson’s Mobil style threads if threads are at the top of the choke...

Hatsan 12ga Shotguns

Interchanges with Carlson’s Mobil style threads if threads are at the top of the choke (Flush choke is 2″ long w/ threads at the top of the choke) . Marked V1 – likely Mobil

If threads are at bottoms of the choke possibly interchanges with Carlson’s  Remington Choke (Rem Choke) (Flush choke is 2″ long w/threads at bottom) marked as V3. Some V3 are proprietary  and will not work.

Call with your factory choke in hand to help identify further.