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sig 556

The SG 550 is an assault rifle manufactured by Swiss Arms AG (formerly a division of Schweizerische Industrie Gesellschaft, now known as SIG Holding AG) in Switzerland. "SG" is an abbreviation for Sturmgewehr (assault rifle). The rifle is based on the earlier 5.56×45mm NATO SIG SG 540.

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Recent contents
  1. Jcremer24

    WTS: Sig 556 Upper- Swiss/US Parts

      1. For Sale
    • $500
    • Lynnwood
    • Washington
    Okay- listing this on the forum… Ive had tons of deadbeat buyers/lowballers on this one- so- with that being said, please dont low ball me. This is a very nice Sig 556 (550 series) upper receiver w traditional swiss style long gas system (not SWAT length)- I AM willing to part out everything...
  2. supersixone

    Lots of pics added, Original Fish Gill Sig 556

      1. For Sale
      2. For Trade
    • $1400
    • Olympia
    • Washington
    I have a terrific condition original fish gill sig 556 with sig front and rear folding sights so you can use lower optics mounts. Can make it side folder with a $20 buffer tube folding coupler. This rifle does not require the buffer tube you can easily convert to rear picatiny mount for $100...
  3. Jcremer24

    My New Sig 556!

    Here to share something Im really excited about! I picked up this Sig 556 a month or two ago for a steal. Previous seller had won it at an RIA Company auction. It was one of the rarer models with the classic stock but long gas system and SWAT quad rail. I ran an eotech on it for a few weeks w...
  4. tgrajo

    Sig 556 Rear Diopter Sight

      1. For Sale
    • $160
    • Beaverton
    • Oregon
    I have a brand new never been mounted Sig 556 Rear Diopter Sight for sale. PM me if interested.
  5. djharteloo

    Sig 556 classic OD Green

      1. For Sale
    • $1600
    • Yacolt
    • Washington
    Bought earlier this year from another member, awesome rifle, but trying to go another direction. Unknown total round count, I’ve fired approximately 80 rounds through it. Very smooth, very accurate rifle and an absolute classic. Real shame they don’t come into the country anymore. Has a little...
  6. Y

    Sig556 with adjustable folding stock

      1. For Sale
    • $2000
    • Portland Vancouver
    • Oregon
    16” barrel, 1/7 twist, adj/fld, mini apature folding sight. 2009 model sig556301 comes with factory hard case 1 magazine and original paperwork. The SIG556 rifle delivers unmatched reliability with its stainless steel upper, hardened steel monoblock, threaded to a cold hammer forged barrel. A...
  7. RugerFan

    Sig 556 scm in 556/223

      1. For Trade
    • Vancouver
    • Washington
    I’d like to trade my sig scm for something different. The sig is a gas piston and shoots well and feeds from standard ar15 mags. Magpul ctr stock and a few other upgrades. It’s nice because it’s something a little different from the ordinary semi auto 223s I’m interested in Milsurp, pistols, and...
  8. Benny762

    SIG 556 (550 series rifle)

      1. For Sale
    • $1800
    • Portland
    • Oregon
    Have a rare Green furniture sig 556 for sale This is an AR mag version of the Sig 551. Piston driven. Folding stock. Will eat whatever garbage ammo you feed it. By far the nicest shooting 5.56 rifle I've ever handled. Includes 3 magazines and the primary arms slx 2.5x prism optic
  9. P

    SIG 556 SWAT

      1. For Sale
    • $1000
    • Portland
    • Oregon
    Hello, Selling my new Sig 556 swat. only a 100 or so rounds through it. This has the built in rear sight and the front sight that attaches to the gas block as pictured. No trades, just looking for cash. Paid $2000 but I have 2 now so just trying to move it fast. $1000
  10. jazz hand stumps

    SOLD Sig 556Xi Russian 7.62x39mm last version swiss style folding stock with some cool extras runs AK47 mags

      1. For Trade
    • portland
    • Oregon
    bought this used, looks to have low round count, but gemtech brake has a bit of salt on it. two small holes drilled in handguard for rail? beer holder? brought home, never fired it, put it in safe. comes with 1 factory supplied mag Gemtech quick mount muzzle brake/suppressor mount. extras...
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