03-09-2011, 01:35 PM
Just my luck this board was down when I finally started my first Grendel build. I got a good buy on a Overwatch partial upper, barrel, bolt, BCG and AA upper. Added a AP lower with ArmaLite LPK, and RRA two stage.
![[Image: Aarms01.jpg]](http://i32.photobucket.com/albums/d37/madcratebuilder/65Grendel/Aarms01.jpg)
I know why I got a good deal on the upper, the threads for the barrel nut are not concentric to the center line of the barrel. This causes the floated hand guard to cant to the side. I have had three different tubes and four different barrel nuts, all have the exact cant to them. I have a Mega billet replacement on the way.
I know why I got a good deal on the upper, the threads for the barrel nut are not concentric to the center line of the barrel. This causes the floated hand guard to cant to the side. I have had three different tubes and four different barrel nuts, all have the exact cant to them. I have a Mega billet replacement on the way.