The REAL AVID SMARTFIT VISE BLCK AR15/10 is engineered for precision and stability during firearm maintenance. This innovative lower receiver vise block eliminates the instability commonly associated with traditional blocks, providing a secure fit for all MIL-SPEC AR15s, AR10s, and compatible magwells. Its adaptable structure ensures a snug grip without wobbling, enhancing your work's accuracy and safety. Expanding sections to fit any magwell Includes AR10 Sleeve Magazine lock Knurled texture for secure fit in vise Choose Smart-Fit for unrivaled versatility and reliability in your firearm maintenance.