Classification beneath the NFA indicates buyers must register the trigger assembly and pay back a charge to legally have it. While the FRT-15 E3 is designed for ease of set up, Skilled gunsmith set up is suggested to make certain right fit and function. IIRC, having a FRT (Forced Reset https://johnathanpfvjx.birderswiki.com/1356949/the_ultimate_guide_to_frt_15