I am getting a T8 Moderator (Pre-Owned) and would like to put a question to "those in the know".
The moderator I am collecting today has been used on a heavy barreled rifle so I am almost certainly goint to have to change the delrin (screw in) washer on the back of the moderator to one that suits my rifle which has a sporter barrel. My rifle came with a delrin washer which (I am told) is for a T8 moderator but when I slide it down the barrel to where it would normally sit with the moderator in place it seems to have about 1mm of clearance all the way round between the barrel and the delrin washer.
Is this right/acceptable or can anyone tell me what the acceptable/recommended clearance should be between the delrin washer and the barrel please.
Thanks in advance.