SIG SG 556

The SIG 556 is the U.S. made version of the SIGARMS® SG 550. The SIG 556 showcases the same high-end and premier performance two position adjustable gas piston operating rod system.
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The SIG 556 is the U.S. made version of the SIGARMS® SG 550. The SIG 556 showcases the same high-end and premier performance two position adjustable gas piston operating rod system.

The System

The system was engineered by SIG's sister company Swiss Arms and combines it to a trigger housing that cuts the rifle's weight by a pound and is designed to accept standard AR magazines. The SIG 556 additionally features a 16" military grade cold hammer forged barrel, tightly chambered in 5.56mm NATO, with quality twist rate of 1 in 7".

The forged forearm housing the gas operating system is ergonomically vented by non-slip polymer featuring the exclusive SIG TriRail design with three fully integrated Picatinny rails for mounting various accessories. The optional and removable flip up front combat sight is adjustable for elevation and windage. The Picatinny rail enhanced receiver is made of superior strength carbon steel with a heavy duty wear-resistant Nitron X rifle finish.

The contoured trigger housing is constructed from a heat treated aircraft grade aluminum alloy with an anodized finish designed to survive all types of extreme conditions. The assault rifle comes featuring a smooth two-stage trigger. The SIG 556 also showcases an ambidextrous safety and is specifically designed to accept standard AR magazines. A 30-round, high quality magazine is supplied with each rifle.

Design Details

Spare battery compartments are generously provided in the practically designedrubber padded watertight adjustable butt stock as well as the pistol grip. Sling attachment points are also offered on the butt stock.

SIGARMS also offers the SIG 556 SWAT. The SWAT model will showcase the same compact and ergonomic design of the standard SIG 556 with 16" barrel however will feature a tactical quad rail and a flat top Picatinny railed receiver. These two SIG rifles are the first of several new SIG 556 models that are currently in development at SIGARMS.

3 Comments

5 years 46 weeks ago, 5:23 PM

Dr wrink

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Aug 2008
Like the sig 550

its almost the same as the Sig 550, looks a little diffrent than the sig 550 must be good becasue Sig 550 is great!

5 years 38 weeks ago, 9:37 AM

Sig Jim Navy 226

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Lieutenant Colonel
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Oct 2008
Location:
Naperville, Illinois, United States
Sig 556

Handles well and less recoil that the AR-15. Somewhat more heavy for an extended carry. Only one real concern. When brass ejects the cartridge hits the back of the bolt/chamber. Contacted Sig for an evaluation but nothing yet.

3 years 48 weeks ago, 2:13 AM

Anonymous

Wow

I love Sig's but where can I get one of these I contacted my local Dealer and he said he had none and not really sure where to get one. Though he is an old guy (at least in his late 70's early 80's{no offences guy who are in the prime[old]}) but I would love to take one for a spin and own of coarse. The link up top didn't send me any where.

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SIG SG 556 Info

Category:
Assault Rifles
Manufacturer:
Sig Sauer
Action:
Rotating Bolt
Caliber:
5.56 x 45 mm NATO

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