The Real Avid Smart-Fit Vise Block in Red and Gray offers unparalleled versatility for firearm enthusiasts. Designed to accommodate both AR10 and AR15 style rifles this innovative vise block provides a seamless transition between models. The AR10 sleeve effortlessly slides and locks onto the AR15 block ensuring adaptability and ease of use. With its expandable block feature you can achieve a snug fit with just a few simple turns. Additionally the included AR Pivot Lock securely holds the AR15 upper in place making cleaning and maintenance a breeze. The Smart-Fit Vise Block is the perfect addition to any gunsmithing toolkit combining functionality and convenience in a sleek durable design.