ratski said:
But in this case, it is the receiver that is registered, not the auto sear.
Dave
I know. In all the examples I mentioned, those were cases of RR's.
RR AR's using DIAS - can't drill hole.
RR HK's using "auto sears" - can't drill hole.
RR UZI's using slotted bolt - can't remove rail.
This is why there are registered UZI sears out there that are permanently married to the receivers.
He registered regular SMG sears before 1986 then after '86 put them in UZI's. In the case of the full size, he took out the slot which created a new MG.
In the case of the MINI, he relieved the trunion which created a new MG.
He also did this with AK's registered AK sears then got host guns drilled for the sears. ATF caught up with him in 1988 and made him stop this practice and made him permanently marry them to the receivers.
In the examples above those are all sears that were registered.
In your case, you are talking about a receiver that is registered so that is what is permanently married to the sear. You cannot have extras as that would be creating a new MG's you can repair it though.