Need these new parts?

[GREG Shooter123]

I need to get these part new but not sure what to search. They are from the barrel of my gun when I have been taking them apart and I need them new. Could you please provide me with link to places where I can buy these parts. Pictures below.

Thanks for the help!
GREG

View attachment 12208

View attachment 12209

 

[straffham]

Not seen that arrangement before, what make and gun are they from?

 

[GREG Shooter123]

gr15 raider, there from inner barrel, got it sorted now though, cheers