Description FB Whitman & Son drop in auto sear for M16/AR platform. Manufactured in Winstead Connecticut and fully transferable. Aluminum constructed block with steel trip sear and spring. This DIAS device is the serialized and registered part currently without a host gun. It can be dropped into and function with many AR-15, M16, and M4 pattern firearms new and old. Allowing the host gun of your choice to be made legally fully automatic and can be swapped in and out of host guns at the owners discretion. On a Form 3, Ready to ship. NFA Item, THIS ITEM REQUIRES A $200 TAX STAMP AND APPROVAL BY THE ATF NFA BRANCH PRIOR TO PURCHASER TAKING POSESSION. Condition: Overall excellent, has not been test fired but appears to function as expected and shows little wear. Serial: 293 Manufacturer: FB Whitman and Son Inc Model: M16/AR Drop in Auto Sear Book# 02877