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5.56 upper

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 and similar in dimensions to the .223, but is not totally identical to the .223 Remington cartridge designed by Remington Arms in the early 1960s.

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Recent contents
  1. D

    Ar15 10.5" 5.56 upper complete minus BCG

      1. For Sale
    • $300
    • Seattle
    • Washington
    Ar15 5.56 10.5" completed upper minus the BCG. The upper is a Aero Precision Slick no forward assist with dust cover, Fortis Charging handle, Aero Precision 10.5" barrel with Hera arms Linear comp, Fortis handstop, Hera Arms Keymod handguard, gas block and gas tube are from Surplus ammo, low...
  2. arakboss

    SAA 10.5" Complete 5.56 Upper (not Aero complete but actually complete with BCG/CH) $340 Shipped.

    https://www.surplusammo.com/products/saa-10-5-5-56-1-7-nitride-12-s12m-mlok-ff-flashcan-complete-ar-15-upper-receiver-free-shipping.html They have some good deals on other uppers and BCGs as well...
  3. idahopostman

    LWRC PSD 8.5" 5.56 Upper Receiver AR15

      1. For Sale
      2. For Trade
    • $950
    • Kelso
    • Washington
    Gently used. LWRC International short-stroke gas piston operated upper for AR platforms. NOTE - does not include BCG, buffer spring or buffer. SPECS 1) Series: M6A2 - low profile gas block w/mid length quad rails. 2) Model: PSD-Classic Mod 0 2) Caliber: 5.56mm 3) Item #: PSDU5B8LEO...
  4. BrandonQuixote

    Complete 11.5” 5.56 upper

      1. For Sale
    • $420
    • Hillsboro
    • Oregon
    Complete upper, Brand new BCM upper (tight!) and Radian charging handle (Redmond!). NiB BCG (slippy!), Faxon 11.5” gunner profile 5.56 barrel (mid length gas!), Midwest 10.5” SLH Mlok handguard (green!) and Forward controls Design KM6315 comp/flash hider (Gucci!) Here’s the catch- the handguard...
  5. Mark

    PSA/MidWest 10.5" 5.56 upper for 11-12" upper (MLOK preferred)

      1. For Sale
      2. For Trade
    • $300
    • Everett
    • Washington
    Looking to trade my 10.5" upper for 11.5-12" upper, maybe 14.5"... PSA upper + Midwest Ind. Rail (no optic, BCG, CH, QD, or rear) Will add cash if better parts. Would strongly prefer a BCM MCMR upper or something similar. May sell for $300 but prefer to trade... If interested in the whole...
  6. G

    Adams Arms Evo 7.5in 5.56 Upper

      1. For Sale
    • $500
    • Mcminnville
    • Oregon
    Selling off my complete Adam's arms 7.5in Evo piston upper. Upper is used. Maybe 300 rounds fired through it. Comes with a PWS CQB muzzle device on it which does a rather remarkable job of mitigating the blast and fireball typically associated with the short 7.5in 556 barrels. Will send with...
  7. SPSharpshooter

    18 inch 223 Wylde Upper (New)

      1. For Sale
    • $300
    • Roseburg
    • Oregon
    PSA complete upper Rifle length gas system Charging handle and BCG included
  8. D

    Larue Predatobr 14.5" 5.56 upper

      1. For Sale
    • $800
    • Bellevue
    • Washington
    For Sale: Larue Predatobr 14.5" 5.56 upper Barrel is pinned and welded with the older 1st gen Surefire Muzzle Brake Round count is at around 400 rounds Comes with 60 rounds of federal gold medal .223 (all I have left!) Has a BCM gunfighter charging handle with RTV sealant mod, sling mount...
  9. Seek3r

    PSA 7" 5.56 upper

      1. For Sale
      2. For Trade
    • $325
    • Clackamas
    • Oregon
    Up for sale is PSA 7" 5.56 NATO 1/7 Nitride 9" Lightweight M-Lok Freedom Upper With Fluted Flash Can, BCG, CH, & MBUS Sight Set SKU is- 516447329 if you would like to look up all the specs Been a fantastic upper about 200 rounds through it zero issues. $325 FTF in the Clackamas area please...
  10. huntpotter

    PSA 10.5” 5.56 Upper And KAK Blade Brace Package Deal

      1. For Sale
    • $300
    • Vancouver- Ridgefield
    • Washington
    Up for sale, Southwest Washington, Vancouver area, Clark County area. PSA 10.5” 1/7 5.56 Upper. Classic series. With PSA Premium bolt carrier group and charging handle. I installed the KAK Flash Can. I’ve fired 60 rounds to break it in on my SBR lower and it functions 100%. Used, but great...
  11. Mygrainman

    12.5” 5.56 Upper/Build kit

      1. For Sale
    • $350
    • Kelso
    • Washington
    Nice little upper I’ve had laying around for too long…Very high quality 12.5” CMMG 5.56 barrel with a Super nice nice UTG Pro MLok rail. All parts are new and unfired, including steel low profile gas block, gas tube, A2 flash hider, standard charging handle. NO BCG Optic shown in first two pics...
  12. farfrompar28

    BCM ar15 5.56 upper!!!!

      1. For Sale
      2. For Trade
    • $500
    • Shelton
    • Washington
    Looking to let go of this bcm upper. 16” mid length w/Troy alpha handguard. No bcg. Text 3609709514 with questions or trades. Thanks Jeff Open to most things related to firearms..
  13. jordanka16

    Ballistic Advantage 10.3" 5.56 upper

      1. For Trade
    • $350
    • Albany
    • Oregon
    Selling my 10.3" upper. Has a ballistic advantage upper and 10.3" 5.56 1/7 twist. lo profile gas block, carbine length gas system. Has a BCM MCMR handguard, and a smith vortex flash hider. Upper runs great, I'm just getting involved with clone builds and don't shoot this one much. $400 now...
  14. W

    Complete PSA 10.5" 5.56 Upper w/ MBUS + Vortex Sparc AR

      1. For Sale
    • $500
    • Seattle
    • Washington
    I've got my sights set on an MCX Rattler so I'm listing up one of my spare uppers. 10.5" Carbine-Length gas system 5.56 NATO 1/7 Nitride 12" Slant M-lok Upper Fluted flash can Comes complete with BCG + CH as well as MBUS sight set. Upper has seen maybe 200 rounds as it is only a spare. I'll...
  15. R

    16in 5.56 upper

      1. For Sale
    • $240
    • Lebanon
    • Oregon
    Unmarked upper with del-ton 16in heavy barrel. Comes with charging handle and BCG with lest than 500rds through it. $240
  16. R

    16in upper 5.56

      1. For Sale
    • $300
    • Lebanon
    • Oregon
    unmarked forged upper receiver with a 15in handguard and 16in delton heavy duty barrel with birdcage. Comes with milspec nitride BCG and charging handle. Less than 500rds down the pipe only thing cosmetically is part of handguard was cut to tighten down gas block. Don’t really want to ship.
  17. R

    16in 5.56 upper

      1. For Sale
    • $300
    • Lebanon
    • Oregon
    unmarked forged upper receiver with a 15in handguard and 16in delton heavy duty barrel with birdcage. Comes with milspec nitride BCG and charging handle. Less than 500rds down the pipe only thing cosmetically is part of handguard was cut to tighten down gas block. Don’t really want to ship.
  18. lucy li

    COLT AR15 Centurion M4 Upper with Colt BCG

      1. For Sale
    • $750
    • Puyallup
    • Washington
    Pick up in Puyallup / Spanaway or make arrangements will ship on your dime This is cross posted on the web time stamp wins out Colt AR-15 Upper Receiver Assembly 5.56x45mm 16" Barrel with Centurion CMR 13" M-Lok Handguard Price $800.00 shipped insured $750.00 FTF The Colt LE6920 Enhanced...
  19. .45's and .38's

    Palmetto FN 10.5” 5.56 Upper

      1. For Trade
    • $1234
    • Portland
    • Oregon
    Listing a like new FN upper for trade I am the original owner and purchased this all new , I shot maybe 200 rounds through it . factory palmetto premium 10.3” FN upper 10.5" CHF 1:7 A2 CARBINE 5.56 NATO PREMIUM CLASSIC AR-15 UPPER Spikes Tactical BOLT CARRIER GROUP- NICKEL BORON - Spider Logo...
  20. cooperdh

    PSA 10.5” 5.56 Upper

      1. For Sale
    • $300
    • Gresham
    • Oregon
    I have a great condition PSA upper for sale. Barrel is 10.5 inch 1:7 twist rate stainless steel and I bought it brand new. It has only about 200 rounds down the pipe and shoots 1 inch groups no problem from 100 yards. No BCG or CH included.
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