1. Is this a factory length barrel?
2. Is this legal?
3. Anything I should know about this particular gun?
4. Did I do ok at $175?
1) Sure looks factory.
2) As long as you can't see an 18" dowel in the barrel with the bolt closed it's OK with the Feds.
3) I had a 120 once in hunting trim. Worked great.
4) And How!