Though the advantages of the HK416 have become debatable in modern years, with upgrades to traditional AR rifles enhancing their reliability, Sig Sauer ... a 4-position gas regulator, allowing ...

Key Point: The tendency for Sig Sauer to promote a new rifle every few years is probably ... The 516 has a 4-position gas regulator, allowing for reduced recoil and wear. The 416’s piston ...