05-20-2013, 11:47 PM
I'm building a Grendel upper and I'm going to pretty much duplicate what I did on my .223 upper shown here. Just ordered another OPS-4 receiver. The rifle pictured shoots in the 4's all day, my best group being .260". [ATTACH=CONFIG]3307[/ATTACH][ATTACH=CONFIG]3308[/ATTACH]
