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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. huntpotter

    Aero M4E1 5.56 Midlength Complete Upper Receiver FDE Tan 16 Inch

      1. For Sale
    • $340
    • Vancouver Ridgefield
    • Washington
    Up for sale, Southwest Washington, Vancouver area, Clark County area. Local meet up, or I can ship with PayPal, and you pay the freight. Aero Precision factory built upper. M4E1T 5.56 NATO. 16" Midlength. FDE Tan. 15" ATLAS R-ONE M-LOK Handguard. 5.56 NATO 16" Midlength, 1/7 twist, 4150 CrMoV...
  2. BrandonM92

    Never fired Aero Precision M4E1 AR-15 10.5in 5.56 Rifle Barrel Upper Receiver

      1. For Sale
    • $460
    • McMinnville
    • Oregon
    Never fired upper,Bought from OpticsPlanet for $534 ,Didnt come with BCG or CH and giving a discount since it doesn't have the flash hider. No trades.
  3. K

    NOVESKE 9MM UPPER RECEIVER

      1. For Sale
    • $275
    • Issaquah
    • Washington
    This Brand New Noveske 9mm Upper Receiver is for sale for $275.00. This brand new, in mint condition, upper receiver has never been installed on an upper receiver. Noveske has been out of stock on this upper receiver for quite awhile now. I can meet you at the Home Depot in Issaquah, WA, once...
  4. jozguns

    Aero M4E1 ODG upper receiver for Aero M4E1 black upper receiver

      1. For Trade
    • Portland
    • Oregon
    I have an Aero M4E1 upper receiver in ODG, and I would like to trade for the same thing in black. I would also trade for a black carry handle upper receiver. My receiver is used and has a few minor scratches. It has the forward assist, but does not have the dust cover. I am looking for a...
  5. Rob86

    Geissele Super Duty upper receiver 16 5.56/.223

      1. For Sale
      2. For Trade
    • $899
    • Canby
    • Oregon
    I have a Geissele Super Duty Upper for sale. It looks very similar to the one in the stock photo I have posted here. Very nice condition. (I also have a matching lower available for the right deal). No BCG/CH at this price. Could provide them for extra $. I have too many ARs and am trying...
  6. D

    PWS AR-15 MK109 MOD 2-M Upper Receiver Assembly 300 BLK Long Stroke Piston and PWS CQB 30 Compensator

      1. For Sale
    • $990
    • Maple Valley
    • Washington
    Good afternoon NWF forums. Primary Weapon Systems AR-15 MK109 MOD 2-M Upper Receiver Assembly for sale. New in the box. Also included PWS CQB 30 AR15 5/8X24 BLK FSC compensator, part number #PWS3CQB58C1. Price is $990 shipped. Payment methods - Zelle, Paypal F&F. Here is link to the...
  7. mattmcg

    SOLD...

      1. For Sale
    • $1600
    • San Ramon
    • Other
    SOLD...
  8. goose

    Aero Precision 8 300Blk Upper Receiver

      1. For Sale
      2. For Trade
    • $400
    • Sherwood
    • Oregon
    PRE BLACK FRIDAY price drop for the week only Aero Precision Atlas R1 upper receiver with BCG and charging handle. Brand new never fired. Ordered a while ago and lost interest in 300 Blk while waiting. Pick up in Sherwood or Tualatin. Open to trades, ammo, rangefinder or let me know what you have.
  9. Gunbuggy

    Aero Assembled Upper Receiver - Black

      1. For Sale
    • $80
    • Vancouver
    • Washington
    $80, $87 shipped. I just had 4 wisdom teeth removed and I’m not feeling up to driving all over hells half acre to make a deal. It’s priced for a quick easy pickup sale in the Salmon Creek / North Vancouver area. Thanks!
  10. Gunbuggy

    Stripped Aero Precision 20" 5.56 Upper Receiver W/ Pinned FSB

      1. For Sale
    • $250
    • Vancouver
    • Washington
    Up for sale is a fantastic condition Aero Precision 20" Upper Receiver. It has less than 300 rounds through it and looks great. The barrel is a 20" 5.56 NATO, Rifle Length, 1:7 Twist, 4150 Chrome Moly Vanadium, QPQ corrosion resistant finish, the same upper that they use on their M16a4 Special...
  11. HaynProdigy808

    Aero Precision M5E1 Enhanced Assembled Upper Receiver - Kodiak Brown (Cosmetic Blem)

      1. For Sale
    • $150
    • Oregon City
    • Oregon
    Foe sale is an Aero Precision M5E1 Enhanced Assembled Upper Receiver in Anodized Kodiak Brown. It was purchased directly from Aero Precision. It is a COSMETIC BLEM but I cannot see any blems at all! These are OUT OF STOCK on Aero Precision. MSRP: $200.00 For quicker responses, please text me...
  12. J

    Faxon arak-21 complete 5.56 piston upper receiver

      1. For Sale
    • $595
    • Coburg
    • Oregon
    Complete 556 upper receiver for sale. Fits on any ar15 lower. Adjustable gas piston, interchangeable folding charging handle. Interchangeable calibers to 7.62 and 300 blackout with 6 allen head screws. 12.5" heavy duty unit Upper only $595 no trades, price is firm. Will ship for $20
  13. J

    AR10 upper receiver block

      1. For Sale
    • $25
    • Sherwood
    • Oregon
    New, unused 2 piece upper receiver block. I accidentally ordered 2, costs too much to ship the 2nd one back :(
  14. N

    Aero Precision Enhanced Upper Receiver and 12 Quantum Handguard

      1. For Sale
    • $120
    • Portland
    • Oregon
    Aero Precision enhanced upper receiver - $75 12” Quantum Handguard - $75 Both together - $120
  15. CoolBreeze808

    BCM MK2 BFH 11.5 Complete Upper with BCG

      1. For Sale
    • $640
    • Portland
    • Oregon
    ** Sale Pending Normal wear marks, less than 1,000 rounds on it - factory internals. Will need a crush washer for muzzle device; birdcage is on there hand tight to protect threads. Pickup in Portland by Mall 205. Willing to ship to Oregon address via UPS Ground for $15. Price is firm, not...
  16. D

    18" Ruger AR-15 kit; optic, ammo

      1. For Sale
      2. For Trade
    • $850
    • Corvallis
    • Oregon
    All included: -AR-15 18" Ruger complete upper -Anderson Mfg. complete lower -Vortex Strikefire II Red Dot Sight - SF-RG-501 -Ruger Rapid Deploy Sights -Mixed 556/223 ammo. 150 rds total; All factory, some boxed, some loose. Mostly 556. Complete upper assembly from a Ruger MPR rifle. 18" 1:8...
  17. AdoboArsenal

    BCM Assembled Upper Receiver M4/AR-15

      1. For Sale
    • $100
    • Beaverton
    • Oregon
    Selling an assembled BCM upper complete with forward assist, gas port door installed. Very good condition. Never put together into a complete upper it's just been sitting on my workbench waiting for a build that has been postponed indefinitely. I will upload a few photos of it when I get home...
  18. AdoboArsenal

    Geissele URGI 14.5 complete upper receiver

      1. For Sale
    • $1000
    • Beaverton
    • Oregon
    Selling my URGI 14.5 upper. Includes Reliability Enhanced BCG, and a radian ambi charging handle. It also has Troy folding front and rear sights. Does not include the light, or optics in the picture. Factory built, with a pinned Surefire 4 prong FH. Manufactured around mid 2023, it has the mk16...
  19. T

    Genuine Colt Factory OEM M4 AR15 Upper Receiver Cage Code Marked 13629 Square BAFE Near Mint

      1. For Sale
    • $100
    • Portland
    • Oregon
    Hello, I have for sale two near mint condition Colt Factory OEM M4 AR15 Upper Receivers. Colt Cage Code Marked 13629 BAFE Square Forge Mark. Machined with M4 Feed Ramps and laser engraved T-marks on the Picatinny rail. A thoroughbred upper receiver perfect for a new duty gun or clone build...
  20. spacecowboy5

    Force recon-ish m4a1 clone upper

      1. For Sale
      2. For Trade
    • $375
    • Veneta
    • Oregon
    Howdy yall, I'm downsizing my collection and figured I'd post some of my spare uppers. I've got a somewhat cloneish force recon m4a1 upper built of a Delton m4 upper, it has a hbar chrome lined 1/9 twist barrel Bkf handguard Ergo rail extension And a dead air keymo muzzle device No bcg or...
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