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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. AR_PSYCHO

    Norinco MAK90 5.56mm (Type 84s) FIRE SALE

      1. For Sale
    • $750
    • Beaverton
    • Oregon
    Up for grabs is a shooter grade 5.56mm Norinco MAK90 AK redressed as a Type 84s. This has the original chrome lined barrel and threaded muzzle. Furniture is a mix of East German and Romanian. It comes with 2x-30rd magazines (very expensive). Rifle runs overgassed with M193 so recommend...
  2. T

    Geissele Super Duty Rifle 16" 5.56MM Desert Dirt Color (DDC) with SSA-E X Two-Stage Trigger

      1. For Sale
    • $1500
    • Portland
    • Oregon
    I am selling my Geissele Super Duty Rifle 16" 5.56MM DDC for sale. It's been carefully stored since I purchased it and I have put less than 30 rounds down the pipe. This is not the MOD1 version. Below are the specs. Geissele 16" Super Duty Specifications: WEIGHT: Approx. 7 lbs CALIBER...
  3. T

    Geissele Super Duty Complete Upper 11.5" 5.56mm Desert Dirt Color DDC

      1. For Sale
    • $900
    • Portland
    • Oregon
    Hello, I am selling my lightly used Geissele 11.5" complete upper. I have put roughly 500 rounds through it with no issues. Comes with Geissele BCG, Geissele Aiborne Charging Handle, SureFire 3-prong and Geissele factory box/plastic wrap. MSRP $1,438.00 Asking $900 OBO - not interested in...
  4. T

    Geissele Super Duty Stripped Upper 14.5" 5.56mm Daniel Defense Barrel Desert Dirt Color DDC

      1. For Sale
    • $550
    • Portland
    • Oregon
    Hello, I am selling a Geissele 14.5" DDC stripped upper. Upper is still sealed in factory plastic bag and comes with original box. MSRP $1,142.00 Asking $550 OBO - not interested in trades. I can meet buyer locally in Portland or the surrounding area. Added a picture of what it could look...
  5. peteNW503

    Hornady Frontier 5.56mm NATO 55gr FMJ Rifle Ammo - 450 rounds

      1. For Sale
    • $220
    • Portland
    • Oregon
    I have 3 150ct boxes for a total of 450 of rounds of boxed Hornady Frontier 5.56mm NATO 55gr FMJ Rifle Ammo $210 cash meetup in Se Portland , Gresham or Happy valley
  6. FireArm

    Ranch rifle

      1. For Sale
    • $100
    • Portland
    • Oregon
    BRN180 gen2 16" upper with straight charging handle Separated for $550 FoxtrotMike ranch lower with Rem870 wood stock.separated for $350 Upper has seen a couple hundred rounds Lower is unfired currently Bipod , athlon talos btr 1-4x24, brownells scope mount. 10rd Remington $900 cash firm $1000...
  7. jseppa01

    (As new) Colt 6920 M4 Carbine 5.56mm NATO 16.1in Matte Black - Complete Lower Receiver Only

      1. For Sale
    • $400
    • Vancouver
    • Washington
    Complete lower receiver for sale, used one range session only 40-50 rounds. In as new condition. Comes with lower receiver only (upper sold separately). Also including 6 X 30 round magazines...
  8. jseppa01

    (As new) Colt 6920 M4 Carbine 5.56mm NATO 16.1in Matte Black - Complete Upper Receiver Only

      1. For Sale
    • $450
    • Vancouver
    • Washington
    Comes with Complete upper receiver only (lower sold separately). With 60x .223 rounds (loose) and sling https://www.sportsmans.com/shooting-gear-gun-supplies/modern-sporting-rifles/colt-6920-m4-carbine-556mm-nato-161in-matte-black-semi-automatic-modern-sporting-rifle-301-rounds/p/1663887 Used...
  9. mojorod

    Colt AR-15A4 5.56mm

      1. For Sale
    • $800
    • Salem
    • Oregon
    Colt AR-15A4 5.56mm. Never fired.
  10. E

    Ruger AR556 MPR - 18" 5.56mm

      1. For Sale
    • $470
    • Beaverton
    • Oregon
    Had this rifle for a few years and it's a great shooter, but I need to trim down the collection. In great shape, easily 9/10 condition. No rust or corrosion. Comes with a standard birdcage flash hider installed but the sale will include the original radial muzzle brake as well.
  11. Northwest Firearms

    Smith & Wesson M&P15 Sport III 5.56mm Rifle + 5 Mags + Vortex Optic - $699

    https://www.sportsmansoutdoorsuperstore.com/products2.cfm?ID=303813&avad=22961_f3d06e219
  12. CountryGent

    Couple o' Lil' Can Suggestions?

    So, I am looking for a very short and compact 5.56㎜ silencer for a new Armalite-type rifle, that should be here on 30ᵺ. Already have a can for that caliber, but it is presently wed to a CAR-15-ish SBR, and think will leave there. I'd like to keep this one abbreviated as the rifle it would go...
  13. T

    Geissele Super Duty Stripped Upper14.5" 5.56mm Desert Dirt Color DDC

      1. For Sale
    • $1000
    • Portland
    • Oregon
    Hello, I am selling a Geissele 14.5" stripped upper. Upper is sealed in factory plastic bag and comes with box. Asking $1000 - no trades. Happy to meet locally or ship nationally (buyer pays shipping). Added a picture of what it could look like mounted - Cheers! Details: The Geissele...
  14. T

    Geissele Super Duty Complete Upper 11.5" 5.56mm Desert Dirt Color DDC

      1. For Sale
    • $1350
    • Portland
    • Oregon
    Hello, I am selling my lightly used Geissele 11.5" complete upper. I have put about 500 rounds through it with no issues. Comes with Geissele BCG, Geissele Aiborne Charging Handle, SureFire 3-prong and Geissele factory box/plastic wrap. I've mounted it so you can see how it looks. Price is...
  15. T

    Geissele Super Duty Rifle 16" 5.56MM Desert Dirt Color (DDC) with SSA-E X Two-Stage Trigger

      1. For Sale
    • $2000
    • Portland
    • Oregon
    I am listing my Geissele Super Duty Rifle 16" 5.56MM DDC for sale. It is lightly used as I have put 30 rounds down the pipe. Its been stored most of its life. Below are the specs. Geissele 16" Super Duty Specifications: WEIGHT: Approx. 7 lbs CALIBER: 5.56MM COLOR: DDC LOWER RECEIVER...
  16. Grasshopper541

    FN-15 TAC3 5.56MM

      1. For Sale
    • $700
    • Bend
    • Oregon
    Selling my FN-15 TAC3. Unfired and still in the box. Asking $700 cash, buyer pays transfer. Comes with a FN 30rd mag. Has a radian charging handle, chf barrel, and FN furniture.
  17. L

    Sig Sauer MCX Spear-LT 5.56mm NATO 11.5in

      1. Want to Buy
    • Grants Pass
    • Oregon
    Looking for Sig Sauer MCX Spear-LT 5.56mm NATO 11.5in Coyote Cerakote/Black Modern Sporting Pistol - 30+1 Rounds.
  18. E

    Ruger AR556 MPR - 18" 5.56mm

      1. For Sale
    • $575
    • Beaverton
    • Oregon
    Had this rifle for a few years and its a great shooter, but I need to trim down the collection. In great shape, easily 9/10 condition. No rust or corrosion. Comes with a standard birdcage flash hider but the sale will include the original radial muzzle brake as well.
  19. deltaleader

    M196 5.56mm Tracers

      1. For Sale
      2. For Trade
    • $225
    • Canby
    • Oregon
    *pending sale* These are Talon red tracers. I have shot a few boxes in the past and they worked well. Massive deal! 14 boxes or 280 rounds in total. $300 $225 takes entire lot or $22 $18 per box. Would consider trades for quality XM193 5.56mm or 300BLK or 9mm.
  20. assault15

    Daniel Defense 12.5" CHF Barrel 5.56mm

      1. For Sale
    • $180
    • Beaverton
    • Oregon
    For sale is a low round count (~4 magazines) Daniel Defense barrel in 5.56mm, 12.5" length, government profile, with a carbine gas system length. The barrel is cold hammer forged and chrome lined with M4 feed ramps and a 0.069" gas port diameter. It is factory dimpled for a DD or MK12 gas...
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