I am trying to put together my upper and lower (Lower ATR Upper Larue) and it is scary tight, I mean I could barely get the takedown pins in... actually I need to use a small hammer to get them in... as for the rear of the upper it will not slide into the receiver without some serious pressure... Once I got it together it was almost impossible to get them apart. I took it to the range and put about 100 rounds through her.... flawless performance, very accurate.... when I tried to take it apart, well it took me almost a half hour to pry the halves apart.... I have them apart now....any ideas???




















































