Most of the Japanese made guns will interchange without fitting. On Belgian models, it is recommended that a qualified Gunsmith fit the barrel for you. Fitting is simply "the fine grinding of the metal" to make the barrel recoil back into the receiver smoothly.
No
No
Check the barrel and receiver.
if the gauge and chamber length are the same
Library.
No it will not.
Follow the instructions in the A5 manual using the link below.
Where will be marked on the barrel or receiver. When is 1977.
No, the Ion and A5 have different threads.
No
No, a Browning A5 Light 12 made in Belgium cannot use a Light 12 Invector barrel. The Belgian-made A5s were designed before the Invector system was introduced, and their barrel threading and design differ significantly from the Invector barrels. To ensure proper fit and function, it's essential to use a barrel specifically designed for the model and production era of the shotgun.
No