Make sloppy, loose-fitting blocks a thing of the past. Designed to fit over your Smart-FitA(R) AR15 Vise Block, this Real AvidA(R) AR10 Sleeve eliminates any wiggle or movement when working on large frame ARs. Great for securing your firearm when swapping trigger groups, servicing the lower receiver, installing grips and buffer tubes, or cleaning the barrel bore. A true must-have for any home gunsmith. Slides over your existing Smart-Fit AR15 Vise Block (not included) Eliminates any wiggle or movement when working on your firearm Allows for easy access to the underside of your AR Order today!