Snowflakes in Hell has a detailed post on US v. Olofson, complete with links to major documents in the case. It appears a good deal more complicated than had seemed. Apparently the fellow to whom Olofson had loaned the AR-15 was told not to put the selector switch in a third position. I was wondering how the prosecution had met the requirement that the defendant be shown to have known a full auto was full auto . I suspect this was it.