Loctite 243 is the only threadlocker recommended for use on Shadow Systems optic systems. In addition to functioning as a threadlocker, this product also works as a retaining compound (removes all airspace around the shaft of the screws within the optic body). The 243 version of Loctite is more viscous than standard blue threadlocker which helps prevent it getting places where it should not. Restrictions: By buying this item from Shadow Systems, the Customer certifies that the Customer will comply with any and all requirements imposed by applicable U.S. federal, state, and local laws, regulations, and administrative policies.
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