One other thought comes to mind.

Be careful if you purchase one second hand from an individual. If it has USGI markings or an NSN there are two problems:

1) It is stolen US Government Property. Uncle Sam frowns on that, don't ya know.

2) The barrel length will be 14 inches, and the BATF frowns on scatterguns with a tube length less than 18 inches.

Trust me on this one. I know from experience.....
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I do the things that I must, and really regret, are unfortunately necessary.

RIP OBG