[Help getting my M4 mag tube off (currently Failed)]

I have to do the same to mine. I have the 7 round mag to replace my stock 5 round mag. My question is do I need to replace the spring?

[Cylinder choke tube for Benelli M4]

Found it

[Cylinder choke tube for Benelli M4]

I am trying to figure out where to purchase a cylinder choke tube for shooting federal flight control 00 LE12700. It was recommended online. So I am looking for a redonable priced cylinder choke tube for Benelli M4. I don’t know much about what I got. It might have it.