Any semi automatic gun, be it pistol or rifle, that is “capable” of accepting a magazine that holds 10 or more rounds would be banned, along with any such magazine, be it a fixed magazine or detachable.All these would be banned, which covers a rather large percentage of all firearms currently extant. Seems you would also be responsible for any crimes committed with any firearm you own or ever owned up to 5 years after you sell it.
Even in Oregon I don't see this going very far but you never know. Step 1 there is to get the petition recognized, which has happened.
Step 2 is a comment period which they are currently in. Normally a ballot initiative gets 10 or so comments but this one has over 1000. Topics include a permanent title for the initiative. Some of the suggestions are interesting. If the courts approve the wording and title, there needs to be a second round of signature collection to get it on the ballot.
Step 3, if it gets that far would be the vote from the people of Oregon.