I decided to install a KRG 180 Alpha chassis in place of my GRS Sporter stock for PRS matches. Also got an ARC 10 rnd mag with area 419 mag extension. Just wanted to share since there isn't much info on the KRG Alpha's on the net. It went together pretty smooth except I had to figure out that the hand grips needed to be loosened for the trigger housing/rear action screw to line up properly. Also the mag was tight until I loosened the trigger housing which also serves as the mag latch housing, and re aligned it. It has built in thumb shelves on left and right sides so you don't have to shoot it with the pistol grip, you can leave your thumb on the side, and it is a really comfortable position. Ill see how it does in the June 8/9 match. For an aluminum/polymer chassis, it is actually fairly robust and does not have much for flex when using the bipod on the fore-end.