This is the same tool as we use in the workshop to remove the end off shroud tubes on different FX air rifles.

Impact MK2 (Later versions with 2 pin holes in end) , M3, M4
Wildcat MK3 (Later versions with 2 pin holes in end), MK3 and MK3 BT
Maverick
Crown (Later versions with 2 pin holes in end) and MK2
DRS

Shrouds (with the exception of the DRS) are generally lock-tited onto the end caps. Heat will be required to break thus glue before using the tool.