Sounds like a good deal to me but I'm not too sure about the interchangeability of barrels or clips,
It may be possible but I've never heard anything about it.
If it is possible to change out the barrel or clip from one caliber to another That's news to me too....
That's something you might want to look into before deciding.
Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the outcome of the vote.