The DSR (Defense Safety Ring) is designed as a product enhancement for the Ontario Knife Company Rat 1. Add these Mods to your own Rat 1 knife by removing a few screws and replace the rear spacer with the DSR. Then unscrew the thumbstud and install the thorn to complete the quick deployment system. Made in the United States of America on the Western Slope of Colorado out a strong Chopped Carbon Fiber/ Nylon material.
(Knife NOT included)
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