Mack Henry Richardson appeals from the district court’s dismissal, on grounds of res judicata, of his action against the Federal Bureau of Investigation (FBI). Richardson argues that his 1973 conviction does not prohibit him from owning a firearm and that he has a cause of action against the FBI under 5 U.S.C. § 552a(g)(l). Richardson also argues that the district court should have admitted his “penitentiary packet” into evidence.

Richardson’s brief contains no argument that the district court erred in dismissing his action as barred by the doctrine of res judicata. “Failure to provide any legal or factual analysis of an issue results in waiver.” American States Ins. Co. v. Bailey, 133 F.3d 363, 372 (5th Cir. 1998). Although this court liberally construes briefs of pro se litigants under Haines v. Kerner, 404 U.S. 519, 520-21, 92 S.Ct. 594, 30 L.Ed.2d 652 (1972), pro se parties must still brief their issues. See Grant v. Cuellar, 59 F.3d 523, 524 (5th Cir. 1995).

Because Richardson has failed to argue the only issue arguably on appeal, the appeal is frivolous and must be DISMISSED as such. See 5th Cir. R. 42.2. Richardson is WARNED that the filing of *978 future frivolous appeals may result in sanctions.

APPEAL DISMISSED AS FRIVOLOUS; SANCTIONS WARNING ISSUED.