Real Avid AVAR10SFVBS Smart-Fit AR-10 Vise Block Sleeve Red/Gray w/ Expansion Block to Fit AR-15&AR-10

The most versatile vise block available today. Works equally as well with AR10A and AR15 style firearms. AR10 sleeve slides and locks onto AR15 block for instant flexibility. Expand block to snug fit in just a few turns. Comes with AR Pivot Lock (for AR15) to secure upper for cleaning