Jim Watson
Member
It is just a magazine tube cap made long out of solid steel to add weight to the gun.
http://www.jimsearneye.com/barrelweight.html
There are also mechanical and mercury filled "recoil reducers" that replace the cap and other versions that go inside the magazine, leaving room for just the one extra shell required for Skeet doubles.
http://www.jimsearneye.com/barrelweight.html
There are also mechanical and mercury filled "recoil reducers" that replace the cap and other versions that go inside the magazine, leaving room for just the one extra shell required for Skeet doubles.