If you own one for the Remington or Mossberg, could I ask you to measure the mag tube diameter and barrel diameter of your guns.
I ask because I have a Beretta 1301 Tac that came with the factory 7 round mag tube and a factory polymer clam that I’m looking to replace The metal extended mag tube has a polymer tube that covers it. Under heavy recoil, I’ve found that the clamp can move quite a bit. I think it’s because there isn’t enough friction between the polymer on polymer contact surfaces.
My barrel measures .90” in diameter and my tube is 1.2”. Thanks!