A sear that does require alteration to the host gun’s receiver is not a conversion part, and is not able to be registered as such. Some slipped by NFA Branch, in particular AK-47 “sears” that required a hole be drilled in the gun’s receiver, like a regular receiver conversion of the semi-auto AK. Such “sears” in the hands of innocent buyers were left on the Registry, with the requirement that they were not to be removed from the host gun, in effect converting them into receiver conversions in the eyes of BATF. However any in the possession of the persons who made and registered them were disallowed, and removed from the Registry. See Vollmer v. Higgins, 23 F.3d 448 (D.C.Cir. 1994) for mention of the AK sears. Also see FFL Newsletter, Summer Issue 1988, Bureau of Alcohol, Tobacco and Firearms, page 2, Washington, D.C.

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