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5.56mm

The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO) 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. FireArm

    Ruger American Ranch Black/FDE Bolt Action Rifle - 5.56mm NATO

      1. For Sale
    • $500
    • sheridan sherwood
    • Oregon
    I will be in Bend on the 12&13 if anyone out there is interested new, no box, comes with 5rd and 10rd mag. has a muzzle device on it. $500 cash willing to meet from Portland to Salem, Oregon City to Lincoln City, you choose the FFL, I can meet Thursday through Sunday If your out of State...
  2. B

    1k rounds IMI 62gr 5.56mm M855

      1. For Sale
    • $435
    • Roseburg
    • Oregon
    1,000 rounds (2x 500 round cases) of IMI 62gr 5.56mm M855 ammunition for sale. In my opinion, this is the best M855 on the market. Sold as one lot only. $435.00 CASH picked up in Roseburg or Sutherlin. NO TRADES
  3. SunTzu

    SOLD Supressor QD Mounts & Muzzle Devices (A LOT)

      1. For Sale
    • $300
    • Portland
    • Oregon
    LOCATION: Portland Metro. Price: $300 for entire lot (50% off of new) Up for sale is a lot of QD mounts and muzzle devices for any industry standard 1.375x24 Suppressor. The muzzle devices (flash hiders and compensator) are in 1/2x28 & 5/8x24 (5.56mm & 308 win/300blackout). Brands are...
  4. B

    IMI 62gr 5.56mm M855

      1. For Sale
    • $450
    • Roseburg
    • Oregon
    1,000 rounds (2x 500 round cases) of IMI 62gr 5.56mm M855 ammunition. In my opinion, this is the best M855 ammo available. Sold as one lot only. $450.00 cash picked up in Roseburg or Sutherlin NO TRADES
  5. Worksjo

    Daniel Defense MK12 5.56mm

      1. For Sale
    • $1575
    • Keizer
    • Oregon
    Selling my Daniel Defense MK12 5.56mm (18” barrel) comes with 5 Magpul mags and Factory case. Everything is as it came from the factory. 150-200 rounds fired in a couple range trips then I cleaned it and it has sat in the safe since. Condition is excellent and like new. ~700 rounds of factory...
  6. Maximum Magnum

    Premium PSA AR-15 in 5.56mm with Primary Arms MicroPrism 3x green reticle

      1. For Sale
    • $770
    • Beaverton
    • Oregon
    This was a build I did last year and it turned out really sweet, but I'm going to instead focus on an Aero Precision build that I started in earnest last week. I know people talk a lot of bubblegum about PSA, but I love their stuff. I've bought or built over a half-dozen PSA rifles and they've all...
  7. S

    WTS: Arsenal SAM5 5.56mm AK New in Box

      1. For Sale
    • $2000
    • Las Vegas
    • Other
    Brand new in box Arsenal SAM5 milled receiver 5.56mm including polymer furniture and intermediate length stock, factory double hook trigger, factory 14x1mm shark fin muzzle brake - which can be used with bayonet, and 20 round magazine $1900 + shipping. Factory 6x5 bayonet available to buyer...
  8. B

    SOLGW 13.7" EXO2 5.56mm Rifle with extras

      1. For Sale
    • $1100
    • Roseburg
    • Oregon
    SOLGW 13.7" 5.56mm EXO2 rifle for sale. Factory barreled upper with pinned and welded KNOX (Keymo), 1/7" 5.56mm, with SOLGW BCG, and a SOLGW branded Radian Raptor LT charging handle. Lower is factory SOLGW Rebellious Stripes with a Larue MBT2S straight bow trigger, Radian Talon ambi safety...

  9. FN 15 TAC3 Carbine 5.56MM

      1. For Sale
    • $1050
    • Vancouver
    • Washington
    FN-15 TAC3 5.56 carbine, brand new unfired still in the box. Comes with a box of ammo and a FN factory 30rd magazine. Asking $1050, buyer pays transfer fee. For any questions text 541-668-5290.
  10. af306

    Noveske 5.56mm barrel, 13.7" long, $250 shipped

      1. For Sale
    • $250
    • Lake Oswego
    • Oregon
    2012 Noveske SS Infidel 13.7" 5.56mm 1:7 twist. Mid length gas system. New, never fired. Includes Noveske low profile gas block and barrel nut and mid length gas tube and pins. $400 new. $250 includes tracked and insured shipping.
  11. fiveshot

    CZ Bren 2 Pistol 11" Barrel 5.56MM, HBI Handguard and a few other mods.

      1. For Sale
    • $1800
    • RENTON
    • Washington
    SOLD SOLD SOLD
  12. FireArm

    Galil clone 5.56mm

    If these took AR mags I’d buy one lol 😂...
  13. B

    1,000 rounds PMC X-Tac 62gr M855 5.56mm

      1. For Sale
    • $400
    • Roseburg
    • Oregon
    Sealed case containing 1,000 rounds (50 boxes of 20) of PMC X-Tac M855 62gr Green Tip 5.56mm ammunition. $400.00 cash (FIRM), picked up in Roseburg or Sutherlin.
  14. B

    1k Round Case PMC X-Tac M855 62gr 5.56mm

      1. For Sale
    • $400
    • Roseburg
    • Oregon
    Sealed case containing 1k rounds (50 boxes of 20) of PMC X-TAC M855 62gr Green Tip 5.56mm ammunition. $400.00 cash (FIRM), picked up in Roseburg or Sutherlin.
  15. RobMa

    - SOLD - New Colt M4 Commando 11.5 inch 5.56mm Heavy Barrel Assembly w/ Fixed Front Sight, Delta Ring Assembly and A2 flash Hider - SOLD -

      1. For Sale
    • $319
    • Seattle
    • Washington
    Sorry, this item has sold New Colt M4 Commando 11.5 inch 5.56mm Heavy Barrel Assembly w/ Fixed Front Sight, Delta Ring Assembly and A2 flash Hider - FREE SHIPPING - Factory Colt M4 Commando heavy profile (FBI/HRT), 11.5 inch, 5.56x45mm NATO, carbine length gas system barrel. Complete barrel...
  16. B

    SOLGW 13.7" EXO2 5.56mm Rifle

      1. For Sale
    • $1100
    • Roseburg
    • Oregon
    Sons of Liberty Gun Works (SOLGW) 13.7" EXO2. Factory EXO2 13.7" barreled upper with pinned/welded KNOX, SOLGW BCG, SOLGW Radian Raptor LT charging handle. Lower is a factory Rebellious Stripes with a Larue MBT2S straight bow trigger, Radian Talon ambi safety, Springco Blue Spring and H buffer...
  17. Gotyoursix

    (2) 5.56MM 20RD AK MAGS, CIRCLE 10

      1. For Sale
    • $1
    • Potland
    • Oregon
    Hello All, Up for sale today are (2) 5.56MM 20rd AK mags, Circle 10 556 AKs (works well with Zastava and allegedly Romanian SAR-3s). These are factory 20rd Bulgarian Circle 10 mags. One has a tiny amout of saning to the front feed lip to fit an AK, otherwise they are like new. $40ea or both...
  18. A

    SOLD - Geissele Super Duty Rifle, 16", 5.56MM - Luna Black

      1. For Sale
    • $1700
    • Edmonds
    • Washington
    NEW in box. Bought March 2022 at Sharp's in Spokane WA. Never fired. Save $400+ GEISSELE SUPER DUTY 5.56 NATO RIFLE - 16" LUNA BLACK https://geissele.com/super-duty-rifle-16-5-56mm-luna-black.html LENGTH: 16" CALIBER: 5.56MM COLOR: Luna Black LOWER RECEIVER: Super Duty Lower Mil-Spec...
  19. O

    Surefire Socom 5.56mm 4-Prong Flash Hider *10-23-2022*

      1. For Sale
    • Puyallup
    • Washington
    I have a few of these new in box. dont get them confused with the 3 prong Surefire Socom 5.56mm 4-Prong Flash Hider - 1/28 FH556RC-1/2-28 asking 185.00 175.00 each meet in puyallup any questions start a conversation dont post here cross posted NO TRADES
  20. B

    Sons of Liberty Gun Works (SOLGW) 13.7" EX02 5.56mm

      1. For Sale
    • $1295
    • Roseburg
    • Oregon
    SOLGW 13.7" 5.56mm EXO2 rifle for sale. Factory barreled upper with pinned and welded KNOX (Keymo), 1/7" 5.56mm, with SOLGW BCG, SOLGW branded Radian Raptor LT charging handle, and a set of used MagPul PRO BUIS (not pictured). Lower is factory SOLGW Rebellious Stripes with a Larue MBT2S straight...
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