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systems

A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory.

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Recent contents
  1. Wulf Arms

    Global Ordnance, Monolith, Semi-automatic Rifle, 556NATO, 16" Barrel, 1/7 Twist, A2 Flash Hider, Matte Finish, Black, B5 Systems Grip NEW

      1. For Sale
    • $1079
    • Vernonia
    • Oregon
    New Stock, Side Charging Next Gen AR-15 w/ fully Ambidextrous Controls! This is a unique one. It can be fired with the stock folded. The Global Ordnance Monolith is the evolution of a bufferless rifle platform. This revolutionary rifle platform is compact, lightweight, feature-rich, and will...
  2. Hines11b3x

    TRIARC Systems - 13.9" 5.56mm TRACK 2.0 AR15 Barrel - Mid-Length

      1. For Sale
      2. For Trade
    • $200
    • Stayton
    • Oregon
    For sale or trade [TRIARC Systems - 13.9" 5.56mm TRACK 2.0 AR15 Barrel - Mid-Length Less than 500 rds on it Currently on my rifle I need a 16-18 SPR/mk12 type barrel Trade +/- barrels $200 cash, Venmo or Zelle Meet in Salem or Stayton I can install/swap on your rifle for no cost at...
  3. gregfisher

    (SALE PENDING)Shadow Systems XR920 Elite, Lipsey Camouflage Cerakote, FDE Slide

      1. For Sale
    • $900
    • Hillsboro
    • Oregon
    . A true unicorn of a firearm Limited Series, Lipsey, Camouflage, Cerakote Slide, FDE Shadow System XR920 Elite (4" barrel. Full size, 17-round capacity, night vision front sight, interchangeable backstops, extended beavertail, undercut trigger guard, spiral-fluted, unthreaded match-grade...
  4. s75n

    *SPF* B5 Systems Bravo Stock - FDE

      1. For Sale
    • $30
    • Portland
    • Oregon
    Used in good condition $30 Meet near SE 33rd Powell Blvd
  5. C

    Army contracts Barrett for 30 mm grenade rifle for anti drone and defilade targets

    https://armyrecognition.com/news/army-news/2025/us-army-adopts-barrett-30mm-grenade-rifle-to-neutralize-drones-and-defilade-targets Excerpt from the article "This cutting-edge 30mm semi-automatic grenade launcher is being developed as part of the U.S. Army’s Precision Grenadier System (PGS)...
  6. tmess33

    Shadow Systems Dr920L

      1. For Sale
      2. For Trade
    • $1300
    • Bremerton
    • Washington
    Looking to trade Shadow Systems Dr920L w/Holosun 507c and Holster. Low round count & fun to shoot. I am looking to trade for a nice Edc worth 12-1300 or cash on top. Interested in PDP pros, p226 legion, or 365 fuse Legion Thanks!
  7. S

    Shadow Systems MR920 9mm with bag & 2 OEM Glock magazines. Fancy G19 clone

      1. For Sale
    • $450
    • Salem
    • Oregon
    Picked this up in a trade, and I've already got a pile of Glocks & adjacent. Essentially a really sweet Gen 3 Glock 19. 2 15 round Glock mags with it, flared mag well, front night sight/blacked out rear. Thinner grip than the Glocks, but with adjusters in the bag. Shoots great, but I've gotten...
  8. tmess33

    Shadow Systems DR920L Elite

      1. For Trade
    • $1250
    • Bremerton
    • Washington
    Looking to trade a bundle: Shadow Systems DR920l Elite- w/ Holosun 507k Will come with holster Sub 200 rounds - TacSol x-rings 10/22 I'm primarily interested in A Cz Shadow 2 carry + a little cash Or Double Stack 1911/2022 Other interests as well! Let me know what you got!
  9. notgarandthumb

    SHADOW SYSTEMS MR920 ELITE

      1. For Sale
    • $900
    • Missoula
    • Montana
    SHADOW SYSTEMS MR920 ELITE 9mm, threaded barrel, optics ready. Includes all original accessories, the only change is a Standard Co USA trigger shoe and ghost connector, but the original parts are included as well. Also includes a radian ramjet and sig red dot. I just bought NVGs and want another...
  10. tdemore1743x

    Shadow Systems CR920 Foundation- $450 @ Bereli

    https://www.bereli.com/shadow-systems-cr920-foundation-9mm-pistol-optic-ready-unthreaded-3-4-barrel-white-dot-front-sight-black/ Wow, seems like a great deal to me! Wish I had the funds right now
  11. T

    PSA Dagger w/ Heyward Streams Slide

      1. For Sale
      2. For Trade
    • $250
    • Tigard
    • Oregon
    Dagger frame, with Heyward Streams slide. Stock Glock internals from what I can tell. Will come with one pmag. Transfers at Tigard Pawn, J&B, Adaptive. Buyer pays transfer fee. Trades - p365, m&p shield, Remington 870. $250
  12. Shootz9mm

    Shadow Systems MR920 Trade for G48mos

      1. For Sale
      2. For Trade
    • $550
    • North Plains
    • Oregon
    I want to trade for a Glock 48 MOS pistol. I got this in trade but really want the G48mos. Let's make a deal. Comes with 2 inside the waistband holsters. One Haley Strategic Incog and the white one that I don’t remember anything about. Or $550 cash.
  13. PNDub

    Spiritus Systems Rig

      1. For Trade
    • Oly
    • Washington
    WTT Spiritus Systems chest rig. I wanted to build up a Spiritus Micro MK4 rig and this is the configuration I ended up with. It's all Spiritus except for the Beez Sidewing S4 everything is attached to and the el cheapo elastic mag inserts because, impatient lol. Built on Beez Combat Sidewing S4...
  14. COLDJ

    Shadow Systems CR920 Elite

      1. For Sale
    • $650
    • Salem
    • Oregon
    Shadow Systems CR920 Elite features slide cutouts, spiral barrel, full factory stippling, and RMR optic cut. Purchased in late 2023/ early 2024 and has fewer than 500 rounds. Includes low profile 9 round mag with pinky extension, three ten round magazines (all from shadow systems), soft case...
  15. H

    Supressor mounting systems

    Just got my first can, a YHM R2, looking at all the mounting options is kinda overwhelming lol, I have a few rifles I want to swap the supressor between, most I want a muzzle break on, I like the plan B mount but the cherry bomb looks useless as a muzzle break when the supressor is not on the...
  16. sixsevenone

    Shadow Systems CR920x Elite

      1. For Sale
    • $740
    • Woodburn
    • Oregon
    Comes with 5 mags total. Originally purchased with just 2. Also have a holster to throw in. Never Fired. Not looking for trades. Just looking to sell.
  17. R

    Browning BDA .45/West German Sig Systems 220

      1. For Sale
    • $750
    • Hillsboro
    • Oregon
    Up for Sale Browning BDA .45ACP/ Sig Systems 220. Browning imported these early Sig 220's before Sig had a presence in NA. Euro style mag release (think Ruger MKII) Includes 5 magazines, G10 grips and Galco holster. Less than 500 rounds down the pipe. Transfer at A Cut Above Pawn in Beaverton. $750
  18. A

    Triarc systems 10.5 300 black out barrel

      1. For Sale
    • $200
    • downey
    • Other
    triarc systems 10.5 300 black out barrel like new less than 100 rounds through it. 200 shipped

  19. One shot systems

    Has anyone tried the one shot systems? The pistol brace that's never attached? I haven't seen any YouTube video https://usa1shot.com/
  20. notgarandthumb

    SHADOW SYSTEMS MR920 ELITE 9mm

      1. For Sale
    • $800
    • Florence
    • Montana
    SHADOW SYSTEMS MR920 ELITE 9mm, threaded barrel, optics ready. Includes all original accessories, the only change is a Standard Co USA trigger shoe and ghost connector, but the original parts are included as well.
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