G36 lower that will accept Ar fire control components and grips, this model has the third position marked for using the Franklin Binary trigger set. The hammier will need to have little material removed off of the top to clear the recoil rod and spring assembly and the spring for the selector detent will need to be trimmed or you can drill a new hole in the grip for the spring pocket depending on the grip style you choose. We do offer installation for an Additional $25 if you would like to send your lower parts kit. Must reuse your bolt release from your TG36 lower.