We've been installing comps with crush washers since the debut of the original Recoil Eliminator. Every one has been a pain to work with and little better than a "necessary evil." There had to be a better way. Our Double Crush Washers are the way forward. Thanks to a JP original design and careful metallurgy, your next comp installation can be quick and painless. These washers auto-center and provide smooth, consistent crush without struggle. Each is good for close to 1 1/2 turns for just-right timing. US Patent Number 100,041,753 Mfg: J P Enterprises