This project should be probable.I would have a competent gunsmith give you a quote for threading the barrel to except the Invector plus choke system.
Yes. Briley or some other company will have to do the modification.
No, it should not be fired in older Belgian Brownings.
No. Not recommended. The barrel walls are not fit for screw in chokes. Belgian A-5 barrels that had that procedure done in the 60's and 70's were mostly unsuccesful. The barrels ended up being cut down or discarded. Aftermarket screw in chokes worked well with the Over/Under Browning guns, but not the Automatics. It's recommended to purchase a Japanese made barrel (with invector chokes) and have it fitted to your Belgian gun.
If you go to Brownings Home page you should be able to get some technical help.You could also contact Browning,s Parts and service dept at 1-800-322-4626.
you have a 12ga Magnum made in Herstal Belgium by Fabrique Nationale in 1969. FN was the manufacturer of all belgian Brownings. auto5man
12 gauge Belgian Browning shotgun, serial #296305
Browning never made a model 400 semi-auto shotgun.I believe that your shotgun might have been made using 1 of john brownings Patents,which would require that the patent be posted on your shotgun.
It will be marked if it is Belgian made.
YOu must call Browning.
No, the value of American made Browning Auto-5's, are less than the Belgian models based on like condition. The American made models were made using Remington model 11 machinery. While tens of thousand American models were made during the war, few Belgian models were made and/or assembled during that time. There are very few collectors that are interested in American made Brownings versus the Belgian Browning Collectors.
No, FN did
You can find information right here on WikiAnswers. You have a gun that was made by Fabrique Nationale (FN) in Herstal Belgium. FN made the Belgian Browning guns that Browning imported and sold under their own name. Most of these guns were also made and sold by FN to other World Markets; Technically, these guns are not Brownings, but FN guns. Most of the early brownings & FN guns have all these marking on their guns, with the exception of "Acier Special" which means Special Steel. Acier Special was only stamped on the FN guns, and never the Browning Arms Co. Guns. Provide the model, guage, serial number, and your question. Please give us a try to answer it for you. Thank you