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5.56 .223

The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, fyv-FYV-six) is a rimless bottlenecked intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. It consists of the SS109, SS110, and SS111 cartridges. On 28 October 1980 under STANAG 4172 it was standardized as the second standard service rifle cartridge for NATO forces as well as many non-NATO countries. The 5.56×45mm NATO cartridge family was derived from, but is not identical to, the .223 Remington cartridge designed by Remington Arms in the early 1960s.

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Recent contents
  1. outontherange

    Trade hunting ammo for 556 or 762x39

      1. For Trade
    • Portland
    • Oregon
    Let me know what you have. Posting for friend so may be delay getting back right away. 1 box 350 Legend (19 rounds) 1 box 45/70 (20 rounds) 1 box 270 (20 rounds) 9 boxes 308 (180 rounds)
  2. NotOneWay

    [LTB] AR PISTOL UPPER (5.56 / .300 BLK)

      1. Want to Buy
    • Vancouver
    • Washington
    As the title says. Preferably 7.5 - 10.5 - of either caliber. Open to DM me your offers! (must include BCG+CH)
  3. P

    PSA AR15 5.56

      1. For Sale
    • $425
    • Salem
    • Oregon
    NEW Palmetto State Armory AR15 Flat Dark Earth adjustable 5.56 16in 1:7 twist Tacfire charging handle MPI Full-auto BCG... Phosphate finish/9310 steel Warranty info. I once sold a brand new gun to someone on an auction type platform who later complained and wanted their money back. Their...
  4. unionguy

    5.56 55 grain Lake City Brass

      1. For Sale
    • $125
    • Gladstone
    • Oregon
    5.56mm Nato, 55 Grain, Lake City. I have 303 loose rounds (will come in a ziplock bag, or if you have a can for it I'll dump them from my can to yours). I only shoot 62 grain now. See photo for condition. $125. Meet up in the Milwaukie/Gladstone area. Thanks!
  5. MichaelH

    Done  Aero Barreled Uppers w Atlas Handguards On Sale at BKing Firearms all less than $340.00

    Quality parts for a budget price if building a decent 5.56/.223 AR. Here is the 16" model. https://bkingsfirearms.com/shop/complete-upper-receivers/bkf-15-16-5-56-nato-complete-upper-receiver-w-atlas-r-one-handguard/ Here is the entire sale page for Aero Uppers...
  6. C

    (AR15) Diamondback DB-15 (feeding problem)

      1. For Sale
    • $400
    • West Linn
    • Oregon
    Db-15 in good condition other than the fact that it double feeds. Not sure what the problem is.
  7. hammerstriker

    5.56 M855 Green Tip Ammo 270 Rounds

      1. For Sale
    • $120
    • Salem
    • Oregon
    Selling the last of my M855/Green Tip ammo. All been properly stored in a climate controlled safe. 110 rounds of Lake City 160 rounds of PMC X-TAC 270 rounds total $120 and would prefer a FTF transaction in or near Salem, Oregon, but I am willing to travel a bit for the right deal. I have...
  8. hammerstriker

    5.56 Lake City M855

      1. For Sale
      2. For Trade
    • $70
    • Salem
    • Oregon
    I've got 160 rounds of 5.56 Lake City M855 Green Tip on stripper clips and with a stripper clip guide. Has been stored in an indoors climate controlled safe. Hoping to work some sort of a trade for some quality/match grade type .223/5.56 ammo.
  9. StereoDeli

    5.56 Green Tip ammo

      1. For Sale
    • $75
    • Albany
    • Oregon
    Selling eight(8) boxes of Winchester 5.56 62gr Green Tip ammo. For a total of 160 rounds. Selling all together.
  10. WeaponizedMRE

    Federal M855 150Rd packs

      1. For Sale
    • $70
    • Caldwell
    • Idaho
    150 round packs of Federal (Lake City) M855 5.56 NATO ammunition. I have a ton of this stuff and am looking to just offload some of it to fund some other projects since I am shooting pretty much all handloads at this point. 4 packs shown in the photo but I have more available if people are...
  11. ivanthebear

    20" Light Weight Profile Barrel

      1. For Sale
    • $75
    • Vancouver
    • Washington
    Hello, For sale is a del-ton chrome-moly 1:9 20" light weight profile barrel, rifle-length gas port. New in wrapper. Had build plans that didn't pan out. $75 Thanks
  12. Jadeon

    FNH SCAR 16 fde rifle bundle, Belgium Production

      1. For Sale
    • $3900
    • Yamhill
    • Oregon
    Hello, Included as pictured; •Sought after Belgium production Scar 16 fde, RCH 5.56 •Geissele Super Scar trigger, with original FN trigger & hammer. •Kinetic Development Group (KDG) fde 6" extended hand guard. •KDG rear QD mount •Trijicon MRO red dot •Geissele MRO mount •Magpul fde AFG •x10...
  13. Nwshooter503

    Rifle rest, foregrip, ammo, ar15 tool, otis cleaning kit

      1. For Sale
      2. For Trade
    • $20
    • Keizer
    • Oregon
    It's all I got left to sell if someone can please help me out I need to make rent and get food
  14. ScarceResource

    1,000 rounds PMC X-Tac 62gr M855

      1. For Sale
    • $500
    • Portland
    • Oregon
    Sealed in the cardboard shipping box. Prefer not to split into quantities smaller than 500rds. No trades, please. If this ad is active, the ammo is available.
  15. ScarceResource

    820 Rounds IMI 5.56 M855 in sealed 30 Cal Can

      1. For Sale
    • $450
    • Portland
    • Oregon
    Factory-sealed IMI 5.56mm M855 green tip ammo in a 30 Cal ammo can. No trades, please. If this ad is active, the ammo is available.
  16. D

    BCM 14.5 ELW BHF upper

      1. For Sale
    • $700
    • Scappoose
    • Oregon
    Hi, I'm selling this BCM 14.5. It's a ELW BFH which has a CHF barrel and it has a Surefire warcomp pin and welded to it. The upper will include the BCG. It has around 750 rounds through it. I'm only selling because I'm a broke college student or I'd keep it. It does have marks on it as shown...
  17. Jadeon

    FNH SCAR 16 fde rifle bundle, Belgium Production

      1. For Sale
    • $4200
    • Yamhill
    • Oregon
    Hello, Selling as a package. Everything in the photos are included in the sale; •Sought after Belgium production Scar 16 fde, NRCH 5.56 •Geissele Super Scar trigger, with original FN trigger & hammer. •Kinetic Development Group (KDG) fde 6” extended hand guard. •KDG rear QD mount •Trijicon...
  18. D

    NEW VG6 Epsilon Brake 5.56 $55

      1. For Sale
    • $55
    • Sandy
    • Oregon
    Got in a trade and don’t need. Brand new in box. Looking to get $55 local (Sandy) or $62 with shipping.
  19. MichaelH

    SPT - 16 Aero Precision M4e1 Enhanced barreled upper with Quantum handguard 5.56/.223

      1. For Sale
      2. For Trade
    • $275
    • Portland
    • Oregon
    Areo Precision enhanced upper (Aero handguards bolt to the receiver not a barrel nut) 15" Quantum mlock handguard 16" nitride 5.56 barrel w/ mid length gas system. A2 flash hider. No carrier/ bolt or charging handle. Maybe 500 to 700 rounds through it. A ding here or there from being used are...
  20. Babyhuewy

    .40, 380 acp, 44-40, 303 british, 308 and more, 6.5 Grendel

      1. For Sale
    • $500
    • Jefferson
    • Oregon
    If boxes are open it shows what's missing. If the boxes are closed its full. I would prefer to sell all at once. But will sell separately. Cash only please, no trades please Will travel to Albany or Jefferson to meet. Feel free to make reasonable offers 300 win mag $60 303 brit $20 308...
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