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.
https://www.sigsauer.com/pinned-and...ccessories&utm_medium=email&utm_source=Eloqua
Not super familiar with the 516, but this would be a MD legal configuration because of the piston operation.
https://www.sigsauer.com/pinned-and...ccessories&utm_medium=email&utm_source=Eloqua