Did not fit - Lancer Systems Beretta 1301 Competition Extension Tube

Evthing about the product was great. Well built it looks like it could take a beating. Looked great on the shotgun. With one exception. It did not fit. I could not tighten it all the way down. Which caused a gap between the tube and the stock.So the barrel and action also were not flush. Which is extremely unsafe. I probably got a defective item. Which such a big mistake I will not give them a second try.