I could swear I have seen this information posted before, but I tried a couple of searches and could not find anything.
My question is...If you have an AR with 14.5 barreled upper and you order a 10.5 version to mix it up every now and then, do you have to have a 2nd registration certificate showing the same lower receiver serial number but with the new upper measurements?
My question is...If you have an AR with 14.5 barreled upper and you order a 10.5 version to mix it up every now and then, do you have to have a 2nd registration certificate showing the same lower receiver serial number but with the new upper measurements?


















































