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upper receiver

In firearms terminology, the firearm receiver or firearm frame is the part of a firearm which integrates other components by providing housing for internal action components such as the hammer, bolt or breechblock, firing pin, extractor and trigger mechanism, and has threaded interfaces for attaching ("receiving") external components such as the barrel, stock, grip and mounts of telescopic sights. The receiver is often made of forged, machined, or stamped steel or aluminium; in addition to these traditional materials, modern science and engineering have introduced polymers and sintered metal powders to receiver construction.

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Recent contents
  1. jaytee0115

    BCM 16" Mid Length Complete Upper Receiver Group w/ MCMR-15 Handguard

      1. For Sale
    • $620
    • Corvallis
    • Oregon
    Clearing some things out and this upper never made it to a sustained build. Has less than 100 rounds through it. $620 ftf or $640 shipped. Cash, Venmo, Zelle or Apple Pay. No trades. Link to specs here.
  2. Northwest Firearms

    Done  Daniel Defense DD4 FDE RIII Complete AR-15 Upper Receiver - 11.5" - $899.99 + shipping

    Add to cart for price. https://www.primaryarms.com/daniel-defense-dd4-riii-complete-ar15-upper-receiver-11-5-primary-arms-exclusive
  3. justonemorear

    Done  RTB Complete 4.5" 9mm Upper Receiver $197

    RTB Complete 4.5" 9mm Upper Receiver - Black | FLASH CAN | 4.25" M-LOK | With BCG & CH Use code HEAT10 upper
  4. Pladao

    SOLD: BCM Upper Receiver

      1. For Sale
    • $110
    • Tacoma
    • Washington
    Take off upper $110 shipped
  5. Delasangre4231

    Unfortunatly I will never buy from Midwest Industries ever again

    After my disgusting interaction with CMMG customer service now I have another big respected company who is incompetent. I bought a AR-10 upper receiver rod, a tool for installing muzzle devices without torqing on the upper. The tool I received is defective. The upper bar that goes in the...
  6. equin68

    Davidson Defense "Ometron" AR-15 5.56 NATO Upper Receiver

      1. For Sale
    • $120
    • Newberg
    • Oregon
    PI-33449 Davidson Defense "Ometron" AR-15 Upper Receiver - 5.56 NATO - 16" 4150 CMV QPQ Nitride barrel - 1-8 twist - 15" M-Lok Handguard - Does not include bcg/charging handle Upper not fired (no rounds).
  7. Jcon268

    Gibbz 9mm side charging upper receiver.

      1. For Sale
    • $125
    • Gresham
    • Oregon
    Great upper receiver. Gibbz was one of the first doing this style of receiver. Now there are others but Gibbz quality is still top notch. Side charging handle is left side and non reciprocating. Handle locks forward using a detent. This is not a milspec receiver so it may not work with...
  8. Tacompton173

    Aero Precision M4E1 Enhanced Upper Receiver SOLD

      1. For Sale
    • $110
    • Sumner
    • Washington
    Brand new M4E1 Enhanced Upper Receiver (Black) with forward assist, barrel nut, and barrel nut wrench (no dust cover. Comes in original box with plastic wrap. MSRP $220. Out of stock on Aero website right now. Upper compatible with Aero Enhanced Gen 1, Aero Enhanced Gen 2, Aero Quantum, and...
  9. C

    RADIAN & NOVESKE 10.5" 300BLK

      1. For Sale
    • $1200
    • Va Beach
    • Other
    Radian Weapons AR-15 Upper and Hand Guard Set Radian Weapons Raptor-SD changing handle Radian Weapons BCG Noveske 10.5 300BLK barrel Noveske gas black and gas tube Shipping included, Payment via cash, PayPal or Zelle buyer pays any incurred fees.
  10. NoLimePlease

    WTB Rainier Arms Ultramatch Upper receiver.

      1. Want to Buy
      2. Want to Trade For
    • Clackamas
    • Oregon
    Hoping someone might have one of these they’re not using. RAINIER ARMS ULTRAMATCH BILLET UPPER - MOD 3 in 5.56 Name your price or tell me your trade needs? M4 Feed Ramps 7075 Billet Aluminum Mil Spec Hardcoat Anodize
  11. Gunbuggy

    COLT LE6920 Complete Upper Receiver - Accessorized - Never fired

      1. For Sale
    • $900
    • Vancouver
    • Washington
    13629 Marked. Brand new, never fired, only accessorized and slapped on a spare lower. I'm selling because I have 2 of these and I use the other one rarely so I figured I'd keep one and sell one. No Trades Please. It can come as shown or stripped down to a barreled upper minus handguard (I...
  12. CoolBreeze808

    BCM Mk2 11.5 BFH Upper Receiver

      1. Want to Buy
    • Portland
    • Oregon
    New, used, with or without BCG/charging handle - let me know.
  13. H

    AR15 parts for Sale/trade

      1. For Sale
      2. For Trade
    • $1234
    • Forest Grove
    • Oregon
    Wilson Combat 8" stainless 300 blackout barrel. Less than 100 rounds fired. Will include pistol length gas tube. $150 Aero precision M4E1 OD green upper receiver, Less than 100 rounds. $125 or trade for same in black. Midwest Industries 7.25" Combat T rail. Less than 100 rounds. Comes with...
  14. jaytee0115

    BCM 16" Mid Length Complete Upper Receiver Group w/ MCMR-15 Handguard

      1. For Sale
    • $680
    • Corvallis
    • Oregon
    Selling my upper receiver. No BCG or CH. Has been mounted to a lower and has had maybe one magazine fired through it to zero an optic. Went on to another build and this just sits in the safe. This is NOT the ELW or BHF barrel, just a standard 16" upper. Thinning out the safe to fund some other...
  15. B

    WTB BRN-180 10.5"

      1. Want to Buy
      2. Want to Trade For
    • Beaverton
    • Oregon
    Looking for a BRN 180 upper, 10.5" 223 Wylde gen2, condition matters for price, but used is fine as long as it's not trashed or anything. Paint or not, doesn't matter much. Willing to use anything from my other classifieds as a trade/partial trade.
  16. malexandru

    MK18 CQBR MOD1 Upper Receiver Group (URG) *SOPMOD Block2 Clone*

      1. For Sale
    • $1000
    • Wilsonville
    • Oregon
    Near perfect - MK18 CQBR MOD1 Upper Receiver Group (URG) - No expense spared Only 200 rounds through the barrel - Several new components recently installed - I am the second owner of this piece Parts list - - Colt M4 Upper Receiver Keyhole Cerro Forged (Like New Old Stock - some salt from...
  17. C

    C-H Stamped Colt Stripped Upper Receiver w/ Dust Cover And Tear Drop Forward Assist - WTT/WTS

      1. For Sale
      2. For Trade
    • $250
    • Dallas
    • Oregon
    I've got a well-used Colt A1 upper receiver. Marked C H on the stampings. It has seen better days but would make a very cool conversation piece for an old period correct build. Upper receiver comes as-is and what you see is what you get. Everything appears to be in good working order. I...
  18. Bcam

    [WTB] uppers 300$ or less

      1. Want to Buy
    • Happy Valley
    • Oregon
    I need a 9mm upper preferably pistol length I need a 300 blackout upper pistol length as well I need a DPMS LR308 upper 22 in or longer please Send me pricing please and pictures I don't care if it is beat or beautiful
  19. WildBills-AR

    WTB Noveske parts Gen 3 or older.

      1. Want to Buy
    • Beaverton
    • Oregon
    Want to buy older Noveske parts show me what you got. Nothing Gen 4 related.
  20. T

    WTB Stripped Geissele Notched Upper receiver

      1. Want to Buy
    • Hillsboro
    • Oregon
    Got a Mk16 rail with the tan on top and now I need an Upper receiver to fit it. If you got one I want to buy it.
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