Quote History Quoted:
The regulation requires the MFG to mark it in a conspicuous location. The MFG does that.
The regulation does NOT require the MFG to mark it in a location the end user cannot cover with a accessory.
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That was somewhat my point.
It would seem that TPM could mark the barrel in a conspicuous location and finish the build with a vented handguard so that the engraving is clearly/conspicuously visible when it leaves their possession as the maker/manufacturer.
Its not their responsibility if the end user wants to replace the handguard "accessory" with a different version down the road that may or may not cover the markings.
I fail to see how that scenario is different than an end user who installs a optics/claw mount and covers the rib markings. Its not like HK couldnt foresee this happening as they make the referenced optic mount and build in claw mount tabs on the receiver specifically for this reason. (vs. say remington who doesnt manufacture a cartridge side saddle accessory for their 870s which also covers the markings when installed)
For their clone builds it seems like a non-issue.... just mark up the receiver.
However, if doing a German HK94 conversion and the customer doenst want the receiver marked up, than mark the barrel and provide the gun back to the customer with a vented handguard and then leave it up to the end user to decide if they want to replace the $30 accessory with the component of their choosing.