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Correct.
If you have the rifle apart, you will see the main rifles assembly number 476 on the bottom of the receiver. The bayonet latch button is a three digit number (670), probably proceeded by...

The assembly number of the latch is completely different from the rifle receiver assembly number.
It's not uncommon to see the cross-hatch mis-aligned on this part. For whatever reason, some...

The latch parts have a separate assembly number, so if your bayonet housing matches the last three digits of serial number you're good to go, and you have a matching bayonet assembly.