James Widtfeldt appeals the district court’s 1 without-prejudice dismissal of his pro se civil action for failure to prosecute. Upon careful review, we conclude that the district court did not abuse its discretion in dismissing the action without prejudice, because Widtfeldt failed to establish that he had properly effectuated service against defendants within 120 days after filing his complaint. See Fed.R.Civ.P. 4(m); Bullock v. United States, 160 F.3d 441, 442 (8th Cir. 1998) (per curiam) (standard of review). Accordingly, we affirm. See 8th Cir. R. 47B.