The Smart-Fit Vise Block for AR9 is an innovative firearm maintenance tool engineered for Glock mag-fed AR9/PCC platforms, Glock pistols and Glock-compatible clones. Its expandable magwell block provides a secure, exact fit for double-stack Glock-compatible magwells in 9mm, .357 and .40 calibers. The included AR9 Pivot Lock further enhances functionality by holding the upper receiver open, offering full access to the chamber and barrel for efficient cleaning or modifications. Built for versatility and precision, this vise block is a reliable tool for maintaining AR9 and Glock platforms.Features :Expandable Magwell Block Ensures a Tight fit for Glock-compatible Double-stack Magwells in 9mm, .357 and .40 CalibersDesigned to Fit Securely in Standard Bench Vise Jaws for a Rock-solid Working PlatformKnurled Edges Provide Improved Grip and Stability when Clamped in a ViseAR9 Pivot Lock Holds the Upper Receiver Open