It includes a quick disconnect (QD) sling swivel on the buttstock for convenience. The front rail is equipped with Arca and a picatinny rail, while the side slots are MLok compatible, allowing for the addition of weights or other accessories. It is available in either bronze or grey. Jimping pattern underneath the rail to help grip shooting bags. This setup is great for use with FX 480cc or 580cc bottle. If you have a 700cc bottle, checkout the optional extended rail. *Note: This kit does not include a castle nut wrench. You will need one to adjust the length of the buttstock.