Command Arms Safe-T-Stix Barrel Plugs are the key to safe training practice, instruction, display and gun storage. The CAA Barrel Sticks securely block the barrel and prevent live rounds from being chambered. Command Arms Accessories Safe-T-Stix Gun Barrel Plugs for 9mm Pistols come in bright and visible colors. These Command Arms Accessories SafeTStix fit 9mm pistol barrels.