I once owned a Miroku 20 gauge that had a cut off barrel section reattached by some method at the 11" point from the breech. It was a fairly neat looking repair, so a friend and I went out to test fire. The gun took a little bit of a tumble while it was unsurely leaned against a tree (as I remember, may have been against the car bumper). When I picked the gun up, the barrels fell off, yes, fell off. This is a true story that resulted in many pleasant days playing with an absolutely illegal 11" Miroku 20 gauge. I finally sold it (legally I hope) to a Class 3 manufacturer who procured a tax stamp and resold it.