I’m not familiar with Tanaka’s 870. How does it shoot? gas in the shell, gas in a reservoir, or spring?
I sometime use some of that awful Silicone lube spray to soften up the inner tube to make it a little easier to stretch across the suppressor. the other thing sleeping the supressor gives you a place to attach ‘camo’ to without making up the finish.The rifle came with it.Im not such a fan of suppressors on carbines or rifles,but this one is so short it works.Cool teick witj the inner tube.If its ok with you I just might have to borrow that for the future.This rifle here I am in no hurry to finish.It,like the Golgo13 have there own coolness factor thing going on being old.