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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. B

    Shadow systems Cr920x

      1. For Sale
    • $450
    • Bend
    • Oregon
    Like new maybe 30 rounds just never carry it like a thought I would swampfox red dot night sight two 15 around magazines $450 obo
  2. H

    Mech-Tech Systems Carbine Conversion Unit

      1. For Sale
    • $400
    • Beaverton
    • Oregon
    Mech-Tech Systems Carbine Conversion Unit - this non-serialized upper is designed to go with a gen 3 Glock 17 chambered in 9 mm, and is very solid. Used a few times and then stored for several years, in great shape, comes with a optic!
  3. jp1985

    Wts NIB shadow systems mr920 9mm

      1. For Sale
    • $550
    • Albany
    • Oregon
    I am selling my nib shadow systems mr920. I am asking 600 for it they sell for around 800-1k. Its will come with the box and the papers and two magazines. Must meet face to face no shipping. Meet at local ffl in Salem,Albany,Corvallis, or Lebanon. Buy pays transfer fees. Not looking for trades...
  4. jessygirl20150

    Shadow Systems DR920 ELITE, with Holsosun 509T-X2 - $800

      1. For Sale
      2. For Trade
    • $800
    • Wilsonville
    • Oregon
    Mint. Shadow System DR920 Elite A cut for: - Holosun 509T-X2 (red) - Night Fision Suppressor height sights. Front green, rear blacked out. - Shadow Systems bag and 3 x 17 round mags. - $800 optic included. Send PM if have any questions to keep thread clean. Trades: +/- cash either side. This...
  5. M

    Mountain Tactical Arca-Lite for Tikka Rifle Systems

      1. For Sale
    • $55
    • Helena
    • Montana
    Mountain Tactical Arca-Lite for Tikka Rifle Systems Full length. New in box. Located in Helena. Delivery negotiable. $55 Description from Mountain Tactical's website: Enhance Your Field Performance with the Ultimate Stability Solution Introducing the Mountain Tactical Arca-Lite...
  6. Daredevil27

    [WTS] Shadow Systems MR920 Elite + Optic (Primary Arms GLX RS-15)

      1. For Sale
    • $590
    • Sammamish
    • Washington
    This has been a great gun, zero issues, probably approaching 1,000 rounds on it. Plenty of life left! Shoots extremely well, just thinning the herd right now. I acquired too much during the covid times and focusing on a few and not an excess or more than I need. Again, great gun and not abused...
  7. Xmark1

    (****SPF**** 04/15/26 @ 7:23PM) Shadow Systems MR920 BNIB Never Fired $469 - 9MM

      1. For Sale
    • $469
    • WEST LINN
    • Oregon
    Comes in original box with range bag and two 15 round mags. Non mos. Suppressor height night sights. Magwell. Stainless steel guide rod. Trigger finger ledge & stippling. Dual undercut. Lighter than a G19 even though its size is identical. Compatible with G19 Holsters. Diagonal slide front &...
  8. 3

    Shadow Systems DR920 Combat Optics Ready Full Size Pistol Stock # SS-2004

      1. For Sale
    • $700
    • Hillsboro
    • Oregon
    This has never been fired by the original owner and in new condition. Comes with all original box, carry case, manual, lock, 2 mags and all accessories. Caliber: 9mm Optics Ready Black Spiral Fluted 5" Threaded Barrel Tritium Front Sight, All Black Rear Sight G17 Size Frame Flat Faced...
  9. titsonritz

    ANALYSIS OF PISTOL MRDS MOUNTING SYSTEMS: FAILURE MODES AND PROCUREMENT CONSIDERATIONS

    Here is a major deep dive into pistol MRDS mounting systems. The appendix at the end alone is worth crawling through. Enjoy…. https://blog.roninsgrips.com/analysis-of-pistol-mrds-mounting-systems-failure-modes-and-procurement-considerations/
  10. tmess33

    Shadow systems MR920

      1. For Sale
      2. For Trade
    • $600
    • BREMERTON
    • Washington
    MR920 with Olight SE and tactical triggers trigger kit. X5 mags 200 rounds through it. $600 obo
  11. B

    Shadow systems MR920 War poet

      1. For Sale
      2. For Trade
    • $1000
    • Philomath
    • Oregon
    Runs flawless. Has about 5-600 rd's through it. Comes with 4 15 rd mags, Holosun EPS green dot and range bag that came with the gun. Has interchangeable back straps and a magwell. Only selling because I've found something I want more! It's super reliable and I've never had a hang up with it...
  12. G

    B5 Systems Bravo Stock in FDE

      1. For Sale
    • $30
    • Ridgefield
    • Washington
    Pretty much new. Ended up using something else. My loss is your gain!
  13. Sporting Systems

    Northwest  Washington Gun Law - Vancouver meet up @ Sporting Systems 2/26 12pm-6pm

    Washington Gun Law - William Kirk meet & Greet in Vancouver @ Sporting Systems 2/26 12pm-6pm No agendas or timelines. A chance to meet Bill, ask questions, and hang out in a cool gun shop. 15% off all Minuteman Ammo (except special edition cans and solid silver/diamond products) Raffles...
  14. thinsley

    Shadow Systems MR920 Elite - WITH RDS and Comp and more!

      1. For Sale
      2. For Trade
    • $800
    • Aurora
    • Oregon
    This is a Shadow Systems Elite. It's the model with the fluted, twisted and threaded barrel. Comes complete with the Shadows Systems compensator, Swampfox RDS, and Night Fision sights. The pistol itself costs a grand. You add in all the extras and this is a smoking deal! Most guys are selling...
  15. M

    WTT Shadow Systems CR920 Combat OR

      1. For Trade
    • Auburn
    • Washington
    Like new Shadow Systems CR920 Combat Optics Ready 9mm. Comes with everything they do new plus an additional 3 mags (2 flush and 3 long) and a Blackpoint Tactical Mini Wing IWB holster. Been to the range 1 time, fired 20 rounds and just too small for my hands. Not a mark on it and if I was less...
  16. ZS27

    Shadow systems MR920

      1. For Sale
    • $425
    • Bend
    • Oregon
    I’m selling a few of my firearms to fund a suppressor build. This is my shadow systems MR 920 with the copper colored barrel. I have shot around 800 rounds through it with no failures. It comes with 2 magpul mags 3 glock mags all 15 rounders. Iwb and owb holster and everything that came with it...
  17. KrazyRedhead

    SOLD PRIMARY WEAPONS SYSTEMS 5.56 COMP

      1. For Sale
    • $35
    • Junction City
    • Oregon
    Selling a Primary Weapons Systems flash suppressor/ compensator for a 5.56/ .223. This is 1/2x28 threads and works great. Sells for around $80-100 new. Wanting $35 or $40 shipped. I can meet in Junction City or at the fishing pond on Hwy 99 between Eugene and Junction City.
  18. BlackTemplar

    SALE Spiritus Systems LV-119 Brand New in Bags

      1. For Sale
    • $145
    • Albany
    • Oregon
    All products brand new, never used. Assembled and put on a hanger in closet, was never worn. Decided to ultimately go with a chest rig instead. My loss is your gain. Comes with the following: Spiritus LV-119 Ranger Green Overt Front Plate Bag (Medium 10x12/ SAPI style plates) Spiritus LV-119...
  19. Glock Jock

    WTS Medical IFAK Kit - Warrior Assault Systems

      1. For Sale
      2. For Trade
    • $50
    • PILOT HILL
    • Oregon
    Warrior Assault Systems Multicam Molle medical kit in like new condition. Currently in Pilot Hill, CA so I will ask $6 to ship. Asking $50. Thanks!
  20. brausso

    NIB Shadow Systems CR920P

      1. For Trade
    • Arlington
    • Washington
    I got this a few weeks ago along with it's bigger brother (MR920P). This is the compensated model. It's never been fired or had an optic mounted. I prefer a larger grip, so with that, I'm looking to trade for the CR920XP. That's really the only trade I'm interested in at this point. For local WA...
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