Installation Difficulty Level: N.S. Defense recommends the Knights Armament Company NT4 suppressor Coiled Spring Pin be installed by a competent Armorer with prior experience working on NT4 suppressors and preferably a Certified SR-25 Armorer to maintain the factory warranty. If you are currently looking for an Armorer please visit our Armorer Services section.
Product Description: This is the replacement Coiled Spring for the infamous Knight's Armament Company NT4 suppressor
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