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5.56/.223

The 223 Remington (designated as the 223 Remington by the SAAMI and 223 Rem by the CIP) is a rimless, bottlenecked rifle cartridge. It was developed in 1957 by Remington Arms and Fairchild Industries for the U.S. Continental Army Command of the United States Army as part of a project to create a small-caliber, high-velocity firearm. The 223 Remington is considered one of the most popular cartridges and is currently used by a wide range of semi-automatic and manual-action rifles as well as handguns.
In the US Army, the cartridge is referred to as "Cartridge, 5.56 mm ball M193." The 5.56×45mm NATO was also developed from the 223 Remington.

View More On Wikipedia.org
Recent contents
  1. S

    5.56, 223, 7.62x39, 10mm, ammunition

      1. For Sale
    • Portland
    • Oregon
    7.62x39 Ammo: 360rds = $110 5.56 Ammo: 240rds = $110 10mm Ammo: 250rds = $95 “ Or $300 for Everything Listed Above “
  2. Dallasthedude

    FDE IWI Tavor X95 5.56

      1. For Sale
      2. For Trade
    • $1500
    • North Plains
    • Oregon
    I'm selling my IWI Tavor X95. The color is FDE and I've probably put less than 100 rounds through it. It's a 16.5 inch barrel and 5.56/.223 caliber. I'll include your choice of a standard metal or magpul 30 round mag. I'm mostly looking for cash but I'd be willing to do a trade for another gun...
  3. ScottInPDX

    Federal 5.56NATO XM193 and Winchester WB 9mm Luger

      1. For Sale
      2. For Trade
    • $475
    • Tualatin
    • Oregon
    5.56 ammo sold 600 rounds of Federal 5.56NATO, XM193LC1 AC1, 55 grain FMJ. 420 of them are in an unopened can (can is included), 180 are on stripper clips. 500 rounds of Winchester (white box) 9mm Luger, 115 grain FMJ in unopened loose pack boxes I'm only interested in trading for these two...
  4. Brandon_N1996

    SOLD Smith and Wesson M&P 15 Sport II Excellent Condition

      1. For Sale
    • $400
    • Beaverton
    • Oregon
    SOLD. For sale is my S&W M&P 15 Sport II. In like new condition. Chambered in 5.56/.223. I have put 120 rounds of Hornady .223 Frontier 55 grain FMJ through it flawlessly. Package includes five P Mags in like new condition and one metel magazine in like new condition, Magpul sights, quad rail...
  5. Mjb9164

    VG6 Precision Epsilon Muzzle Brake 5.56

      1. For Sale
    • $50
    • Tacoma
    • Washington
    Lightly used, VG6 Epsilon muzzle brake, 5.56/.223 (1/2x28). Website details -"The VG6 EPSILON 556 is our highest performing tactical muzzle device. The EPSILON 556 is a younger sibling the GAMMA series muzzle brake, but with an attitude that matches its larger size. This Tactical Brake brings...
  6. Flounder

    9mm Dillon 650 xl conversion kit

      1. Want to Buy
      2. Want to Trade For
    • Springfield
    • Oregon
    Thank you!
  7. Baconlord37

    WTS OR  Custom AR-15

    Customized 5.56 AR-15 DMR for sale. Upper and lower receiver are DPMS. I added a Stag A2 stock, mid-length gas system, stainless 18 inch spiral fluted barrel, STNGR USA 15 inch RPTR handguard, Vortex Strike Eagle 1-6x24 scope, Troy Industries flash hider and new ejection port cover. Of my...
  8. Liberty19

    WTS OR  260 rounds of 5.56/.223 .23/per round

    All American eagle -120 rounds of 55 gr 5.56 -80 rounds of 55 gr .223 -60 rounds of 62 gr .223 $60 picked up for it all That's. .23/round
  9. A

    FREE OTHER  5.56/.223 fully processed brass (swaged, trimmed, tumbled). $45/500ct $75/1,000ct. Free shipping!

    Greetings all! I have 5.56/.223 mixed headstamp brass for sale, fully processed (swaged, trimmed, wet tumbled). Once fired. Shipping included! As always, buy more/ save more! $45/500ct $75/1,000ct $140/2,000ct
  10. N

    WTS WA  223 Wylde 7.5” Barrel

    This is an Odin Works 7.5” 223 Wylde barrel with a 1/8 twist. It comes with low profile gas block and pistol length gas tube. The barrel has less than 100 rounds through it. Asking $135
  11. WAYNO

    WTS OR  Ruger American Ranch, 5.56/.223

    Sold... Unfired since purchased new. Boxed with everything it came with. Uses AR magazines. 16.12" barrel. Ruger® Ruger American® Rifle Ranch Bolt-Action Rifle Model 26965 $380., rifle only. I'll pay transfer at a mutually acceptable FFL. Or if it sounds better, $350, and transfer...
  12. Tack_Ryan

    WTS OR  Luth-AR Nitrided 5.56/.223 Bolt Carrier Group

    SOLD Selling a nearly new Luth-AR Nitrided 5.56/.223 Bolt Carrier Group. Chrome lined and milspec, it runs great. Only put a little over 40 rounds through it to test function on a rifle, but I've got another boutique BCG on the way so I don't need this one. Asking $75 OBO
  13. N

    WTS/WTT OR  Bushmaster XM15

    I’m selling an older 16” Bushmaster (Windham made) with a heavy barrel. It comes with one magpul 30rd mag. FFL transfer required. Asking $650
  14. JO JO

    WTS WA  5.56/.223 ammo

    5.56/.223 ammo in 50cal usgi ammo can, 625 rounds of mixed 5.56/.223 ammo ammo is all brass cased ammo $125 I have 2 cans available
  15. mclazyman

    WTS OR  AR15 magazines

    SOLD!
  16. P

    WTS OR  BNIB 10.5” 5.56/.223 Complete Upper

    SOLD SOLD. (385) 355-5010 mobile. $235 or your offer PSA 5.56/.223 Complete (truly) Upper • BCG included • Charging handle included • Brand New • Reliable seller
  17. B

    WTS OR  Voodoo 16" 5.56/.223 barrel

    Good barrel less than 500 rounds thru it ! Asking $ 75 paid $170 Sold
  18. matts

    WTS WA  5.56/.223 once fired brass

    500 once fired, See pic. Most are once fired by myself. $20 Couple hundred more if you want more..... Matt Trade for primers, powder, bullets....
  19. hker71

    WTS OR  MAGPUL Gen 2 PRS (5.56/.223) Model

    Sold on different website.
  20. jplayz

    WTT OR  45acp FMJ for 5.56/.223

    Hello, Looking to trade some 45 acp FMJ for some 5.56/.223.(brass casing only) I have 242 rds, valued at about $75. 142 rds pmc bronze 50 rds of American eagle 50 rds speer lawman Willing to meet n. portland, hillsboro, scapposse areas. Thanks!
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