Benelli Recoil Spring Tube For 19MM Receiver

This fit my HK Benelli M2 super 90 perfectly.

After many hours of research, I needed a new recoil tube for my HK Benelli M1 super 90 12 gauge, serial number starts with M279. Not much info out there, but this is the exact replacement part, 19mm thread into receiver, blued steel, I reused my piston assembly and used a new threaded plug in the end, which now has a plastic lock ring and went together tight, which has got to be better for future service compared to what Benelli sent these out with. They apparently used a thread locker that in my case, no matter how much heat and our torque, the original would not let go with out a catastrophic fight like I have seen in any gun. These are hard to source as of 2019. My original was fine and showed no issues or trust, but the spring was weaker over the years. I installed a Wolff factory load spring, hope it serves me the rest of my life.