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5.56

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. Though they are not entirely identical, the 5.56×45mm NATO cartridge family was derived from and is dimensionally similar to the .223 Remington cartridge designed by Remington Arms in the early 1960s.

View More On Wikipedia.org
Recent contents
  1. Joe Link

    Done  AAC 5.56 77 grain OTM 20 rounds - $10.99 ($0.55 CPR)

    Good buy when it's in stock. Not all that much more than normal target 5.56. https://palmettostatearmory.com/aac-5-56-nato-77-grain-otm-20rd-box-ammunition.html
  2. Joe Link

    Done  Magpul PMAG 30rd GEN 2 MOE 5.56 Magazine - $7.99 w/code PMAG - Free shipping on 10+

    https://palmettostatearmory.com/magpul-pmag-30-5-56x45-magazine-mag571-blk.html
  3. Custom 5.56 NATO AR15 Pistol 10”

    Custom 5.56 NATO AR15 Pistol 10”

  4. M

    Ruger Mini 14 5.56 stainless

      1. For Sale
    • $849
    • Prescott Valley
    • Arizona
    Lightly used Ruger Mini 14 rifle in 5.56. Stainless, composite stock. Box, ruger rings and rail. 2 5rd and 3 20rd magazines (ruger) Not looking for trades, must be AZ eligible with ID Prescott Valley $850.
  5. Mrjenkins

    Lightly used bcg 5.56

      1. For Sale
    • $80
    • Tempe
    • Arizona
    I have a lightly used 223 556 bcg. I'm asking 80 obo. Not many people reply to stuff posted in the classifieds section. Here goes nothing lol you can text me at 480-216-5995
  6. R

    CETME L 5.56 X 45 Marcolmar semi-auto 16.1 inch BBL

      1. For Sale
    • $1400
    • Tucson
    • Arizona
    CETME L Marcolmar Gen 2 rifle, 16.1 inch BBL, Spanish Green, box, papers, accessories: - Sling - Spanish issue - Bipod - Spanish issue - Bayonet - Spanish issue - Bolt NP3 coated (Silver non-reflective) - 1 magazine Oaky 30 round - Spare parts kit from Marcolmar. This will be a legal sale...
  7. N

    AR-15 DPMS/AGP 5.56 Rifle

      1. For Sale
    • $500
    • Globe
    • Arizona
    DPMS upper, AGP lower, Magpul flip up rear sight, steel flip up front sight, one 30rd steel mag. No dust cover or forward assist. Shoots great. In good condition. Located in Globe, AZ but can meet in Phoenix / Valley usually.
  8. H

    SOLD SOLD SOLD SOLD

      1. For Sale
    • $500
    • Prescott
    • Arizona
    FREE SHIPPING or FREE DELIVERY up to 100 miles M4E1 Threaded 12.5” 5.56 Carbine length // Complete Upper SKU - APAR700304M30 AR15/M4 5.56 Charging Handle (Aero Precision) SKU APRH100000C Aero Precision 5.56 Bolt Carrier Group Complete - Black Nitride SKU - APRH100615C $500, this part is...
  9. G

    5.56 NATO/.223 Rem 20" Bull Barrel AR-15 Rifle w/ Barska 4-16x50mm Scope and Bipod

      1. For Sale
    • $1150
    • Goodyear
    • Arizona
    Bought and assembled the rifle (complete upper + complete lower) in January 2021. Scope was purchased at the same time. The rifle has not been used and has been kept in a rifle sock which I will give with the rifle. Details of the rifle are posted below. 5.56 NATO/.223 Rem 20" Bull Barrel...
  10. B

    5k+ .223/5.56 brass casings

      1. For Sale
    • $400
    • Anthem
    • Arizona
    These are casings only. Unpolished & not processed. May include both commercial and military Headstamps. 53.88 lbs Shipping is included in price.
  11. B

    5.56 NATO Hornady ammo.

      1. For Sale
    • $470
    • Tucson
    • Arizona
    500 rounds of Hornady Frontier 75 grain BTHP Match ammo. This is a case and will be sold as such. $470 Not interested in trades at the moment.
  12. Gunwild

    WTS - American Eagle Tactical 223.

      1. For Sale
    • $400
    • Spokane
    • Other
    I have 500rd of Federal American Eagle Tatical 55g I'm looking to sell asking $400 will ship on buyer's dime! PM only please.
  13. S

    WTT: New brass Federal 5.56 XM193 55gr for new brass 9mm or new brass .45 ACP

      1. For Trade
    • fountain hills
    • Arizona
    I have new brass Federal 5.56 XM193 55gr rounds that I want to trade for new brass 9mm rounds, or new brass .45 ACP rds. I want new brass, 115, 124, or 147 gr only. No re-man ammo. Winchester, Blazer/CCI, Federal, American Eagle, Mag-Tech, IMI, PMC preferred. Others may or may not be...
  14. Brodiewhiting

    Ar-15 pistol fde/black

      1. For Sale
      2. For Trade
    • $1650
    • San Tan Valley
    • Arizona
    Ar-15 pistol 7.5" barrel 1:7 twist barrel , forged fde aero upper fde sb tactical brace Quentin defense lower and CMMG trigger spikes tactical nickel boron BCG aero precision handguard 7".
  15. A

    Magazines for sale

      1. For Sale
    • $10
    • Phoenix
    • Arizona
    I have 2 10round Magpul 5.56 mags and 1 steel .300 blkout 30 round mag for sale. Pretty much like new as I used each mag for a single range trip. Looking for $10/mag.
  16. A

    SBA3 brace for sale

      1. For Sale
    • $80
    • Phoenix
    • Arizona
    I have a used SBA3 pistol brace. Includes the brace, buffer, buffer tube, buffer spring and castle nut. It’s in great condition. Came off another build I went another direction with.
  17. Donman

    Galil Gallant JRA Israeli Rifle for sale! 556 / 223 caliber

      1. For Sale
    • $2550
    • Peoria
    • Arizona
    Selling a retro Israeli Galil Gallant James River Armory Rifle: 5.56 / .223 caliber With: 18-inch long barrel 1:9 twist, Polymer handguards & grip, folding stock Original Israeli markings and Star Of David logo on the rear of the receiver Comes with Two 30 Rd Mags Must have VALID AZ ID...
  18. S

    Larue Ultimate Upper 5.56 14.5" Barrel, 10.5" M-Lok Handguard

      1. For Sale
    • $1050
    • fountain hills
    • Arizona
    Larue Ultimate Upper 5.56 14.5" Stealth barrel 10.5" M-Lok handguard Includes loose A2 flash hider, FA BCG, charging handle Less than 100 rds, like new All NFA rules apply $1050 shipped to ConUS Zelle preferred
  19. L

    .223/5.56 @ .50cents/rnd!! Cheapest you will find

      1. For Sale
    • $250
    • Phoenix
    • Arizona
    Ive got 500 rnds of Wolf Military classic 55gr .223 hollow points im selling for $250. Selling it all as one 500 rnd lot and firm on price. You wont find it cheaper around these parts. This is fresh factory ammo not reloads. First come first serve. Pickup only in the Phx metro area I can meet...
  20. J

    NEW PSA 10.5' 5.56 Pistol and 300 BO Upper

      1. For Sale
    • $1500
    • Mesa
    • Arizona
    SELLING ALL TOGETHER ONLY: Up for sale is a brand new, unfired PSA 10.5' inch AR-15 pistol chambered in 5.56 mm with an SB tactical PDW brace. Nitride barrel, 1:7 twist. Also included with sale is a PSA 7.5' inch upper chambered in .300 Blackout. These uppers can be swapped out interchangably...
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