The Sig556xi by Sig Sauer provides unparalleled modularity in barrel length, caliber, magazine type, and stock configuration. It features a 3-position adjustable gas piston operating system with a rotating bolt, a Swiss-style folding stock with removable cheek riser, ambidextrous controls, locking flip-up sights, and a polymer handguard compatible with Magpul MOE accessories. This model accepts any Mil-Spec magazines compatible with the lower.
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Action : Semi-Automatic
Caliber : 223 Remington/5.56 NATO
Barrel Length : 16.0"
Capacity : 30+1
Trigger : Two Stage
Stock Description : Polymer Swiss Folding Black
Metal Finish : Black
Muzzle : Sig 3 Prong Flash Hider
Sights : Flip-Up Front and Rear
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Submitted By: brenda c. On 02/29/2016
Easy to order. Received in a timely matter. Looked at and test fired rifles in excess of $3000.00 this 556xi fires as well or better between 300-500yds. Rifle includes flip up sights and a cheek riser. Can't say the same for an overpriced HK.
[5 of 5 Stars]
Submitted By: aaron n. On 05/15/2014
My first piston, and I really enjoy the cycling sound it makes compared to my AR's.
Cheek lined up perfect with iron sights. I would not want any other weld rear assembly.
It throws the brass at least 12 feet high and 25 to 30 feet out at my 2 o'clock..... in other words my brass was landing in front of 2 to 6 lanes away...
con: almost each casing had a dent on the frontneck of the brass folded inward, I'm not sure if re-loaders will like that.
I've only used 62 gr. green tip fed ammo and my shots groups w/ open sight at 200yrds were about 8in, which is way better than my AR's shooting green tip.
I love the lack of blowback since I shot lefty.
Also, glad I got the polymer instead of quad rails, but the hand rail is a little short for my taste. I wear gloves so no barrel burns yet.
I love the quality to price relationship and I won't be surprised seeing this go up in price very soon.
Was not happy 30rd mag was grey and not a Magpul.
[5 of 5 Stars]