I've finished up a 10.5" piston build and I've realized the latch spring that keeps the dust cover securely closed isn't doing the job. The dust cover springs open without the BCB traveling rearward. Is it necessary to take the barrel back off to pull the pin and put a new dust cover on, or is there a workaround that doesn't involve disassembling the upper for such a non critical piece?

Thanks in advance for the input.