This configuration of the Reformation in 5.56NATO has a 7.5\" barrel with a vertical grip. It is classified by the ATF as a shotgun for the purposes of falling under the GCA, but is considered a firearm that does not fall under the auspices of the NFA. This gun is NOT a NFA item so you do not need an SOT to purchase this and can be purchased on a 4473 form (no tax stamp required). Comes with factory installed BFSIII 3-Position Trigger.