AGT Vulcan 3 Moderator Insert

Original AGT moderator comes with a spring wrapped in felt.

It does it's job and since it's a pain to disassemble many tend to leave it as it is

For those that has disassembled theirs, this is baffled insert with recesses for felt strips 

Felt can be 3 mm in thickness or it should be able to compress 

This one has 7 mm bore through it for a 5.50 mm calibre (.22 cal)