Told our immediate families yesterday and I ' ve been secretly freaking out since . I don ' t want to wish away this much anticipatedneeded long weekend but seriously Monday ultrasound can ' t come soon enough . I think I ' ll be so much more excited after seeing baby alive again . And if not , then fuck . I can ' t be the bearer of bad news again . I might move to Alaska or something if that happens . <| sep |> If you are actually referring to a bolt , no , they do not interchange and by the time you have modified one to fit the other , you may as well have fabricated a new one from scratch . If you mean a charging handle , don ' t quote me , but the pin length is different and the stock grips interchange . <| sep |> You live in an economically illiterate bubble where you think doing the equivalent paying people to dig holes with their hands to create jobs makes sense .