I don't know much about it, but Sig is offering a pretty good deal on a pinned welded piston upper.
Not super familiar with the 516, but this would be a MD legal configuration because of the piston operation...
I’m looking to buy an AR that is piston operated, not gas operated and chambered in a 762/308. The Sig 716 looks good to me but I’m also looking at Adcor as well. Anyone have thoughts of either of these two or a different suggestion?