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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. eldbillbo

    Rock River Arms RRA upper receiver

      1. For Sale
    • $90
    • Oregon City
    • Oregon
    In very good condition
  2. S

    BCM Upper Receiver - M4 Flat Top Complete (Unassembled) - DEMO/Scratched

      1. For Sale
    • $50
    • portland
    • Oregon
    BCM Upper Receiver - M4 Flat Top Complete (Unassembled) - DEMO/Scratched, never used, has a minor blemish but nothing affecting usability. Cash only no trades.
  3. M

    Smith and Wesson AR-15 upper w/ BCG + Charging handle + carry handle + stock

      1. For Sale
    • $250
    • Tigard
    • Oregon
    https://riverridgeenterprises.com/products/smith-wesson-mp-15-upper-flattop-receiver-556mm-nato Less than 3000 rounds through it. And I'm estimating high. I got a new upper and don't need this one anymore.
  4. eldbillbo

    Damaged and Repaired Colt SP1 Upper receiver has a ugly spot on it. $100

      1. For Sale
    • $100
    • Oregon City
    • Oregon
    I was going to use it for a dedicated .22 upper or just build a super lightweight upper with it but i am done with projects. This would be good for someone building a super budget lw truck build. one of the sight channel blades broke and was tig welded back on. The weld is ugly but was the only...
  5. J

    Stag Arms - Stag 15 5.56 10.5 IN Tactical Nitride Complete Upper Receiver

      1. For Sale
    • $475
    • Lynnwood
    • Washington
    I have a NIB Stag Arms - Stag 15 5.56 10.5 IN Tactical Nitride Complete Upper Receiver. Brand new and never used. Didn't complete the build I wanted and it's been sitting in the original box. Complete upper with wrench tool (no BCG or charging handle included). Only trade at this time would be a...
  6. m_lou32

    LMT 308 Receiver Set - MARS-H/MRP-H MLOK 12.5”

      1. For Sale
    • $1750
    • Vancouver
    • Washington
    For Sale: New & Never Assembled LMT MARS-H/MRP-H receiver set. This is an LMT MARS-H Stripped Lower Receiver and an LMT MWS MRP-H MLOK 12.5” Upper Receiver. I am in the Vancouver, WA area, just to the north in Ridgefield. I panic bought two receiver sets before the ban, but I have come to...
  7. SgtAwesomeness

    Stripped/Assembled Upper Reciever

      1. Want to Buy
    • Portland
    • Oregon
    Looking for an upper, Blem or otherwise. Picatinny or A2. Thanks in advance!
  8. R

    Aero Precision M4E1 EnhancedUpper Receiver (no forward assist) + Enhanced 10.7" Hand Guard / Rail - NIB

      1. For Sale
    • $220
    • HUBBARD
    • Oregon
    - Aero Precision Enhanced upper receiver. - Aero Precision Enhanced 10.7” hand guard. New in box. Never installed. Upper has never even had a BCG in it.
  9. N

    Aero Precision AR15 stripped upper receiver FDE, new in unopened box (2)

      1. For Sale
    • Vancouver
    • Washington
    Selling two brand new in unopened box, Aero Precision AR15 stripped upper receiver in FDE Cerakote. SKU#APAR501801C $80.00 each Update: One left
  10. huntpotter

    AR Upper Receiver And Handguard Deal

      1. For Sale
    • $80
    • Vancouver Ridgefield
    • Washington
    Up for sale, Southwest, Washington, Vancouver area, Clark county area. Ar-15 upper receiver. SAA logo. Made by Aero. YHM Yankee Hill free float handguard. Includes the barrel, nut and everything for mounting it up. Used, but not abused. Add your own barrel and bolt and you are good to go. I...
  11. RobMa

    - SOLD - New BCM upper receiver with dust cover and forward assist - SOLD -

      1. For Sale
    • $89
    • Seattle
    • Washington
    Sorry, this item has sold New BCM upper receiver with dust cover and forward assist (with logo and new embossed BCM star) (factory assembled) Please PM me for any questions I take PayPal friends and family Shipping OK, S/H $4.99 No trade requests please. No separate part sales please No...
  12. Turtle

    WTT - Ammo for AR15 parts G43 barrel

      1. Want to Trade For
    • Snohomish
    • Washington
    I have some 9mm I can part with. Looking for AR15 parts: BCG Aero Atlas 13"-15" fde handguard Barrels 16" .223wylde/5.56 BCM stripped lower Lpvo Also looking for a threaded barrel for a Glock 43 Don't mind extra parts on the list either Pm me please
  13. wltjd221

    AR-15 upper receiver

      1. For Sale
    • $600
    • Beaverton
    • Oregon
    From grendel hunter 6.5 grendel CASH ONLY [20″ Fluted] 6.5 Grendel – Black Cerakote :Grendel Hunter Billet 7075 Upper Receiver - Black 1-8 Twist 5R 416R Stainless Steel Medium Contour Rifle Length Gas 6.5 Grendel II Chamber :Handguard Color - FDE Cerakote :16″ Grendel Hunter Handguard...
  14. I

    Sons of liberty gun works upper receiver 5.56 800 obo

      1. For Sale
      2. For Trade
    • $800
    • CDA
    • Idaho
    Selling my sons of liberty gun works upper chambered in 5.56
  15. ibond1988

    M5/.308 upper receiver

      1. For Sale
    • $120
    • Sandy
    • Oregon
    I have like new (zero rounds)Aero precision M5 upper . It was assembled so has marks of charging handle .
  16. wsu 5.9er

    AR15 complete upper receiver, 16" 556 w/12" free float

      1. For Sale
    • $400
    • Auburn
    • Washington
    AR15 complete upper receiver from Larsen Outfitters, ready to drop onto your AR15 lower! This upper has a 16" barrel, chambered in 556 NATO, coated in black nitride inside and out from Aero Precision. It also has a Primary Arms 12" free float handguard, with KeyMod quick attach system with...
  17. jerhine23

    Looking to trade for cheap 5.56 upper receiver (psa, anderson, etc)

      1. Want to Trade For
    • Milwaukie
    • Oregon
    Looking for cheap 5.56 upper receiver (psa, anderson, etc), i have an fn509 optics ready with tlr1 and holster...i can take your upper as partial trase then cash for the remaining..looking into getting atleast 500 in cash...im valuing your upper around 260..i only need this cheap upper to be a...
  18. Jjohns

    16” AR Upper Receiver Group

      1. For Sale
    • $250
    • Sumner
    • Washington
    Aero Precision Upper, 16” Ballistic Advantage Barrel CM barrel, carbine length gas system, aero gas block and tube, 556 nato chamber, 1/7 twist. AP hand guard. Built by me (I’m a certified AR-15 armorer). Shot to test function only. Includes charging handle, but NO bolt carrier group. $250...
  19. ashreg98

    Cage Coded colt upper receiver

      1. Want to Buy
    • bellevue
    • Washington
    looking for new CZ or older caged coded colt upper receiver Assembly (no barrel just the receiver), looking to spend 100-150 thx!
  20. Q

    Daniel Defense Mk18 complete upper

      1. For Sale
    • $1400
    • Tacoma
    • Washington
    Brand new never been shot out of Daniel Defense Mk18 complete upper receiver group (black). $1400 OBO. Contact Quinn via text/call 360-710-9275
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