Tactical Superiority builds the Tac-9, an AR-pattern pistol chambered in 9mm that feeds from Glock magazines. Barrels are 416R stainless in 5.5-inch and 8.5-inch lengths, the bolt, front trunnion and steel upper receiver are nitrided, and the lower is milled from billet aluminium with a Type III hardcoat anodized finish. Guns are sold optic ready, with a 33-round magazine, and some are marked Sol Invictus Arms.