06-18-2012, 05:24 AM
Hello all. I wanted to know what the best 5.56 upper is that can be interchanged on a 6.5 Grendel rifle? (or if at all) Say I'm out in the field and want to keep the cost of ammo down, so I change the upper to a 5.56. When I need to switch to a accurate and larger round, switch it with the 6.5 Grendel upper. Is that possible? & what would the best 5.56 upper be that can be swapped? Thanks a lot guys 