SIG Sauer 516

Sig Sauer 516 Capacity

The SIG 516 is chambered in 5.56x45mmNATO (.223 Remington) and feeds from all AR15 pattern magazines.  This gives the rifle a standard capacity of 30 rounds, however the shorter 5, 10 and 20 round magazines as well as the larger 40, 60 and 100 round magazines will work.  This rifle was built with a billet lower and the magazine well’s flare isn’t as defined as forged lowers.

Sig Sauer 516 Ergonomics

The SIG 516 has a typical AR15 control layout but with multiple improvements to the fire controls.  The magazine release can be engaged from either side, the bolt catch includes a manual hold-open extension, the pistol grip has improved contours over a standard A2 grip, and the stock has a SOPMOD style geometry.  The rifle includes a free-floating 7 inch quad rail for a handguard, and a hand stop or front grip is recommended to avoid accidentally touching the gas block which can get very hot.

Sig Sauer 516 Fit-N-Finish

The SIG 516 has been built on both forged and billet receiver sets and the difference between the two is minimal.  Where this rifle stands out, aside from its improved gas system, is in its surface finishes of the contacting surfaces.  The inside of the upper receiver is honed both before and after anodizing for a much smoother finish than budget-ARs, the front face of the upper receiver is trued to improve accuracy through added barrel contact, and the bolt carrier has a much better surface finish than what MIL-SPEC requires.  This offers a much smoother-shooting rifle.