How have courts considered suppression issues in the context of a motion to suppress a firearm?

We considered a similar issue in United States v. Hole, 564 F.2d 298, 300 & n. 2 (9th Cir.1977), in which the defendant challenged the denial of his motion to suppress a firearm prior to his conviction for being a felon in receipt or possession of a firearm under 18 U.S.C. 1202(a)(1). There, the defendant had entered into a stipulation providing that he had been convicted of a felony, that he had knowingly received an operable gun from a gun dealer, and that the firearm had traveled in interstate commerce. Hole, 564 F.2d at 300. We raised the question sua sponte whether the suppression issue was moot for purposes of the appeal because "consideration of the firearm as evidence is not necessary in order to find appellant guilty beyond a reasonable doubt" when the stipulation appeared to be an admission of all of the

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