300 USD
No.
Fully automatic shotgun, no. Automatic rifles and machine guns, yes.
Not for the casual user. Let a gunsmith do it.
Go to Midwest Gun Works or Browning web sites. Both have manuals you can download.
I just bought a fully restored one for $4000.00.
You need to get it lettered by Browning.
A fully automatic shotgun.
Just depends on where you find it and the condition it is in. I was lucky enough to given one. It was in rough shape. I had it fully restored $550. I've never come across one that had already be restored for sale. The few people I know that have one bought it in rough shape at a flea market or antique mall for a few hundred and then had it restored. Hope this helps.
The first fully automatic shotgun was the AA-12
No such Browning made.
about $10,000-$12,000
Fully restored 12k to 15k