Real Avid Smart-Fit Vise Block Features The Real Avid Smart-Fit Vise Block expands to create a precise secure fit within double-stack Glock-compatible magwells across 9mm .357 and .40 caliber platforms. Inserting the block and rotating the adjustment handle tightens the fit holding the firearm steady for cleaning repair or part replacement without the need for a second set of hands. Magazine lock relief allows the block to work seamlessly with the magazine release so the fit stays secure even as the firearm is manipulated. This expanding design accommodates a wide range of Glock models and Glock-pattern pistols as well as Glock mag-fed AR9/PCC platforms from multiple manufacturers. An included AR9 Pivot Lock holds the upper receiver open giving the user full hands-free access to the chamber and barrel for cleaning or modification work. The knurled texture on the block s exterior improves grip and stability when clamped into standard bench vise jaws. Durable construction allows the Smart-Fit Vise Block to withstand repeated use across assembly disassembly and repair tasks without losing precision. For armorers and shooters who maintain Glock pistols or AR9/PCC builds the Real Avid Smart-Fit Vise Block is available for sale at GrabAGun. Real Avid Smart-Fit Vise Block Specifications Manufacturer: Real Avid Model: Smart-Fit Vise Block Compatible Hosts: AR9/PCC Glock Pistols and Clones Color: Gray / Red Material: Polymer Purpose: Cleaning & Maintenance Available At: GrabAGun