Taking the 5.56's to the range tomorrow. Both have been, but never together. Actually, I always feel like I prefer the SLR-106, but I've yet to run'em head to head. On the left is a Noveske N4 carbine, on the right is an Arsenal SLR-106F. Ammo will be a mix of Barnaul and Privi and I will give a full report. Should be fun.