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556 upper

The ADCOR A-556 is an assault rifle based on the M16/M4 series. It is produced by the Adcor Defense Company and was one of the contenders in the US Army Individual Carbine Competition to replace the M4 Carbine.

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Recent contents
  1. M

    12.5 inch 556 upper

      1. For Sale
    • $450
    • Lakewood
    • Washington
    Aero precision odg upper was used on a previous build Odg Ripcord ldr1 handguard nickel boron bolt carrier breach ambi charging handle Carbine gas system Ready for a muzzle device or can! Zero rounds through it meet up in Lakewood or Tacoma Rail alone goes for $300
  2. OverCookedRock

    11.5 1:7 556 Upper (no bcg or ch needed)

      1. Want to Buy
    • Bethany/Portland
    • Oregon
    Hello, I'm looking for an 11.5 upper with mlok rail. Something simple like a PSA or Aero is all I'm looking for. Seeing if anyone has something local before ordering online. I do have a 16in PSA freedom upper with aftermarket 15in handguard I could throw in as well. I have other items for...
  3. M

    Built 12.5 556 upper

      1. For Sale
    • $400
    • Lakewood
    • Washington
    Aero stripped upper 12.5 ba barrel Nickel boron bcg Breach charging handle Ripcord ldr1 10.75 rail zero rounds it except upper was used previously open to offer !
  4. F

    PSA 556 upper complete

      1. For Sale
      2. For Trade
    • $250
    • Woodburn
    • Oregon
    PSA upper complete, only 300 rounds fired. Works great, looking for a 300 blackout for my lower. $250.00 no low ballers please. Or trade and cash on my end for a 300 black out upper. 503-984-5834
  5. A

    16 inch 556 upper complete

      1. For Sale
    • $425
    • Scappoose
    • Oregon
    Looking to sell my 16 inch ar15 upper 16 inch stag arms barrel, gas block, and gas tube. Stngr vypr 14 inch handguard Aero upper and parts kit Microbest bcg Sprinco extractor and springs. Sprinco cryo treated gas rings. Milspec charging handle Only 20 rounds on upper Want to get 425...
  6. Gambeeno

    Fresh 556 upper 16”

      1. For Sale
      2. For Trade
    • $251
    • Portland
    • Oregon
    16” S&W barrel only has 90 rounds down the barrel. Psa upper receiver. New never shot New Gas tube. No bcg. 1:9 Twist Cash or 10.5” handguard for Ar15
  7. WIN308

    Best deal on upper in 556.

      1. For Sale
      2. For Trade
    • $280
    • Hillsboro
    • Oregon
    I have one upper for sale. It's pretty sweet but I want to fund a different project! It's a spikes tactical upper receiver, All black, chambered in 556, has quad-rail handguard, 11.5" barrel. I added the strike industries King comp to go with the "Oppressor" blast shield. $280 OBO Trades...
  8. WIN308

    Best deal on AR Uppers 556,300BLK

      1. For Sale
      2. For Trade
    • $220
    • Hillsboro
    • Oregon
    MOVED TO CLASSIFIED, AR PARTS.. I have two uppers for sale. They're pretty sweet but I want to fund a different project! Also, check my other post for the springfield VHS-2 (Hellion) bullpup rifle. First upper: It's a spikes tactical upper receiver, All black, chambered in 556, has quad-rail...
  9. hisokas

    LWRC IC-DI 556 16" Upper with Strike Eagle 1-6

      1. For Sale
    • $1000
    • HIllsboro
    • Oregon
    LWRC IC-DI 5.56 16" Upper with Vortex Strike Eagle 1-6x24 Red Gen1 Scope AR BDC Shot about 600-800rds mostly suppressed and runs fine. Vortex has no scratches and will come with a battery installed. Will be mostly cleaned and dry when you receive it. Scope will need to be retightened and zeroed...
  10. Jcremer24

    WTS: Sig 556 Upper- Swiss/US Parts

      1. For Sale
    • $500
    • Lynnwood
    • Washington
    Okay- listing this on the forum… Ive had tons of deadbeat buyers/lowballers on this one- so- with that being said, please dont low ball me. This is a very nice Sig 556 (550 series) upper receiver w traditional swiss style long gas system (not SWAT length)- I AM willing to part out everything...
  11. Sasquatch702

    BCA side charging 556 upper

      1. For Sale
    • $250
    • Vancouver
    • Washington
    16 inch One magazine fired through it works great $250 can add od green magpul mbus for $25 more no shipping cash only meet at Vancouver sportsman’s
  12. Sasquatch702

    Nib foxtrot mike 556 upper

      1. For Sale
    • $280
    • Vancouver
    • Washington
    New never been used no bcg or charging handle I ordered it and decided to go with something else paid $300+ with taxes and shipping asking $280 no shipping or cash apps we can meet at sportsman’s in Vancouver or IKEA near PDX
  13. 3wayA

    WTT/WTS Aero 556 upper for 300bo upper

      1. For Sale
      2. For Trade
    • $350
    • Portland
    • Oregon
    Looking to trade my Aero 556 upper for 8”ish 300 blackout upper. We can trade complete uppers or keep our ch and bcg. Warden and warcomp not included. Cash price w/o warcomp and warden $350 Cash price with warcomp and warden $650
  14. Major Payne

    Aero M4 556 complete upper

      1. For Sale
    • Vancouver
    • Washington
    Aero M4 upper with 8" Enhanced Hand Guard 10" CMC Button Rifled Barrel Aero bcg Rise Armament charging handle $525 Willing to ship
  15. WAW44

    Wolf A1 or BRN-180, worth it? What 556 upper to get?

    I have very few things designed after 1945, but I have my obligatory AR and AK. The AR is a budget DI Ruger-556. Before it becomes more difficult, I was looking to get a something different, just for fun. I really don't shoot 7.62x51, so sticking in 556. I also have a 7.62x39 AR already, so...
  16. Jimmy James

    Daniel Defense MK18 RISII railed 10.5 inch 556 upper

      1. For Sale
    • $425
    • Bothell
    • Washington
    MK18 Upper. Black. Includes. DD MK18 RIS II 9.55 inch Handguard. Splintered A marked flat top upper receiver with mil-spec parts. 10.5 inch barrel. Unknown make. It marked 5.56 Nato 1x7 Chromed. With a pinned gas block and gas tube. A2 flash hider. 3 rail covers I was told it was a government...
  17. J

    Sig MCX Rattler 556 upper

      1. For Sale
    • $1400
    • Kirkland
    • Washington
    Open box. Never mounted and never shot. Mcx rattler complete upper in 556 Price is 1400 shipped. You will not find one cheaper PayPal FF or venmo only Cross posted on ar15
  18. WIN308

    I want a 11.5 inch 556 upper

      1. Want to Buy
    • Beaverton
    • Oregon
    Howdy folks, I'm looking for a 11.5 inch upper for a pistol build. I'm willing to drive if you are. Preferably from Oregon (I don't have a Washington or Utah CHL) so I don't want to take off my CCW but if I get the right deal I can work something out. The hand guard must be M-LOK or a picatinny...
  19. FlatDullEarth

    Sig Sauer MCX Virtus 11.5” 556 Upper

      1. For Sale
      2. For Trade
    • $2000
    • Lake Oswego
    • Oregon
    Upper just got back from sig with a clean bill of health. Can ship, looking to get $2000 for it. This is one of my favorite uppers and I’ll be sad to see it go but I have other things that need my money. I have a lower for it as well
  20. papajohn8990

    PSA 556 Upper no scope

      1. For Sale
      2. For Trade
    • $350
    • Stayton
    • Oregon
    PSA 16" MID LENGTH 1/7 NITRIDE 15" LIGHTWEIGHT M-LOK UPPER WITH BCG & CH - 5165449680-NO SCOPE. Has Maybe about 20 rounds through it. Open to trades ammo 9mm, 308 mainly but may consider other. Make an offer.
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