The Firearm Blog

Defense Review have written an article about the new SIG 556 SWAT Rifle/Carbine/Subcarbine

SIG 556 rifles/carbines at SHOT Show 2006 (photos accompanying this article), and found them interesting. We’ve always been fans of the SIG 550-series weapons, particularly after we test-fired a Gemtech-supressed (sound-suppressed) SIG 552 SBR/Subcarbine at SWAT Round-Up 2002. The SIG 550-series assault rifles / tactical rifles utilize an AKM / Kalashnikov-type gas-piston/op-rod system for operation, and you can’t really go wrong with that with regard to weapon reliability.

While the SIG 556 series weapons are currently only availale in 5.56mm NATO, 6.8×43mm SPC (a.k.a. 6.8mm SPC a.k.a. 6.8 SPC), 7.62×39mm, and possibly even 7.62×39mm NATO (7.62mm NATO)/.308 Win. (unconfirmed/unverified) versions are on the way. DefenseReview doesn’t know at present whether the select-fire variant of the SIG 556 SWAT is available in true semi-auto/full-auto configuration, or only in semi-auto/three-round burst config, or semi-auto/3-round burst/full-auto config. Unfortunately, Mr. Poole’s article does not make that clear. Defense Review prefers a straight semi-auto/full-auto selector switch. We like our trigger finger to determine how many rounds we put down range on full-auto, not an artificial limiter. In any case, the SIG 556’s trigger action in the 3-round-burst-capable variant appears from what Mr. Poole wrote to be superior to the Colt M4 Carbine trigger with regard to smoothness and consistency.

I like their caliber offering. It looks like they will be competing with the Magpul Masada.

More here.

Stevedcross @ The Gun Blogs has just posted a review on his new Sig 556 rifle

I brought home a new baby. A brand new Sig 556 rifle. Forward grip, stream light tactical light, HALO sight. What a wonderful piece of engineering! I have as of yet not done any formal accuracy testing, but during the basic sight in session, the rifle was easy to shoot, minimal recoil, very steady, and shot well.

More here.

More info on the Sig 556 can be found at the Sig Sauer website

The SIG 556 features the same high-performance two position adjustable gas piston operating rod system engineered by SIG’s sister company Swiss Arms and marries it to a trigger housing that not only cuts the rifle’s weight by a pound but is designed to accept standard AR magazines. The SIG 556 features a 16” military grade cold hammer forged barrel, chambered in 5.56mm NATO, with a twist rate of 1 in 7”. The flash suppressor uses a standard .5 x 28 TPI thread pattern, ensuring compatibility with after-market accessories. The forearm housing the gas operating system is a vented non-slip polymer featuring the SIG TriRail design with three integrated Picatinny rails for mounting accessories. The optional flip up front combat sight is adjustable for windage and elevation.

More here.