SIG516? Do they exist?

General Firearms Other Semi-Automatic Rifles
1

My search didn’t turn up any references to this rifle which is shown on the SigArms website. I looked at the Ruger 556 rifle and found it to be way too front heavy. I’m wondering if the SIG 516 handles very well, is compatible with an AR-15 (upper specifically), and if it will run full-auto (NFA’ed lower). If it’s piggish like the Ruger 556 rifle then I’ll pass on this one too.

SIG516

TIA,
Sid

2

To my knowledge, the 516 hasn’t been released.

It’s on my list of rifles to consider though.