This item is a must have for cleaning your AR-10. The Link separates the upper and lower assemblies, but holds them securely to allow easy breech access for bore cleaning using a Sinclair Rod Guide. Made of Delrin and stainless steel, it is virtually impervious to solvents. The Cleaning Link uses the rear locking pin and rear locking pin hole and installs in seconds.
Big Book Catalog, Issue:70, Page:078
Sinclair, Issue:5B, Page:025
Sinclair, Issue:5B, Page:154
SPECS: Will require fitting for most takedown pins other than the Armalite AR-10. Will not work on POF .308 rifles with .250 diameter pins, use the AR-15 model 749-002-497.