Check the listing for details. 300 BLK Blackout Magazine ID Marking Bands /Upper Receiver AAC Mag Silicone Band. Condition: New. Listed at 1.25 USD. 1 x Magazine marking band. Bands are dual sided with "300 BLK" text on them. Never mix up magazines again. Use our Magazine ID Marking Band to designate your 300 Blackout magazines. Works on any metal and polymer magazines. - THICKER PREMIUM QUALITY BANDS FOR LONG LASTING DURABILITY. - HIGH VISIBILITY COLOR CONTRAST FOR FASTER IDENTIFICATION WHEN SECONDS MATTER. Please check out our store, you can find more ID bands for other calibers such as 9MM, .48 ACP, .22 LR, 223 REM, 300 AAC Blackout, SUBSONIC, 308 WIN, 5.56 NATO, 7.62x39, 7.62x51 NATO and more. We ship on the same Business Day if the order is placed before 12 pm EST. **Due to lighting and devices difference, the color of the actual product may vary slightly from the images show.1 x Magazine marking band. Bands are dual sided with "300 BLK" text on them. Never mix up magazines again. Use our Magazine ID Marking Band to designate your 300 Blackout magazines. Works on any metal and polymer magazines. - THICKER PREMIUM QUALITY BANDS FOR LONG LASTING DURABILITY. - HIGH VISIBILITY COLOR CONTRAST FOR FASTER IDENTIFICATION WHEN SECONDS MATTER. Please check out our store, you can find more ID bands for other calibers such as 9MM, .48 ACP, .22 LR, 223 REM, 300 AAC Blackout, SUBSONIC, 308 WIN, 5.56 NATO, 7.62x39, 7.62x51 NATO and more. We ship on the same Business Day if the order is placed before 12 pm EST. **Due to lighting and devices difference, the color of the actual product may vary slightly from the images show.