cemeb4dk

Has anyone changed their silver LSN for the black one. I had the silver one in(came with it) so i ordered the black one from nitrohouse and it cam yesterday, just tried to put it in and it doesn't fit, not sure if orings to big or what but it catches just before the threads. Am i suppose to switch the orings from the silver to the black. If anyone knows please advise and I checked the ofna borads and found nothing, Thanks