Manufactured in Wyandotte, Michigan prior to the 1986 registry cut-off, and currently not installed in a host firearm. While deceptively simple in construction, being an aluminum block holding a steel trip sear and a small spring, it's pre-86 registration status makes it an express ticket to build nearly any configuration or variation of AR-15, M16, M4, etc., one desires, including in calibers and patterns not even conceived before 1986. The possibilities are virtually endless, and get a little closer to endless every time a new wave of AR-15 uppers or after-market parts hit the market. And as the sear itself is the registered part, the components of the host gun (or the entire host gun) can be discarded or swapped at will without worrying about the configuration matching the papers.
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