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b5 systems

In telecommunication, 4B5B is a form of data communications line code. 4B5B maps groups of 4 bits of data onto groups of 5 bits for transmission. These 5-bit words are pre-determined in a dictionary and they are chosen to ensure that there will be sufficient transitions in the line state to produce a self-clocking signal. A collateral effect of the code is that 25% more bits are needed to send the same information.
An alternative to using 4B5B coding is to use a scrambler. Some systems use scramblers in conjunction with 4B5B coding to assure DC balance and improve electromagnetic compatibility.
Depending on the standard or specification of interest, there may be several 5-bit output codes left unused. The presence of any of the unused codes in the data stream can be used as an indication that there is a fault somewhere in the link. Therefore, the unused codes can be used to detect errors in the data stream.

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Recent contents
  1. BlackTemplar

    BNIB B5 Enhanced Sopmod Coyote Stock

      1. For Sale
    • $65
    • Salem
    • Oregon
    Brand new in package. $65 shipped. Zelle for the payment please. I am away for school at the moment in Alabama but have been buying and selling while here. Check out my feedback it's at 100%.
  2. BlackTemplar

    BNIB B5 Systems Coyote Tan SOPMOD Enhanced Stock

      1. For Sale
    • $65
    • Salem
    • Oregon
    Relisted due to buyer dropping out. Will fit on a milspec buffer tube. Brand new in box. Price is shipped via USPS. I am currently in Alabama for school, but have been buying and selling while I am here, check my feedback 100% positive. Will take Zelle for payment. Thanks for looking!
  3. BlackTemplar

    BNIB B5 SOPMOD Enhanced Coyote Stock

      1. For Sale
    • $65
    • Salem
    • Oregon
    Brand new in box, enhanced SOPMOD sling for milspec buffer tube. Price is shipped via usps. I am currently away for school in Alabama but have been buying and selling here, check my feedback 100% positive. Will take Zelle as payment method.
  4. Booger_Hook

    AR15 parts Scalarworks / Unity / B5

      1. For Sale
      2. For Trade
    • $150
    • Sherwood
    • Oregon
    Just some left over parts from my past build. Scalarworks Peak 01 rear iron sight - $100 Unity Tactical FAST optic mount - $80 B5 systems black pistol grip - $15 Trigger guard (5) milspec safety selectors- $10 I'll sell everything pictured for $150 Trade for a GBRS Lerna Mount for an Eotech.
  5. Awmish

    AR-15 Furniture All individually priced

      1. For Sale
    • $30
    • Beavercreek
    • Oregon
    $20 for the FDE MOE Mid Length handguard $5 for each set of M4 Handguards B5 CAR 15 butt stock-Sold Korean Glock Mag has sold Willing to ship, buyer pays all shipping costs.
  6. thdpdx

    Magpul, B5 Systems, BCM Gunfighter, AR Grips, Stocks & M-LOK, etc.

      1. For Sale
    • $140
    • Beaverton
    • Oregon
    I've ended up with several like new (or new) AR parts and would like to offer them as a last minute holiday bundle 🎄 $300 worth of of parts all in original packaging. Asking $140. • Aero Precision Mil-Spec Carbine Length Buffer & Spring (New) • B5 Systems SOPMOD Bravo Stock in - ODG (New) •...

  7. B5 systems pistol grip for AR15

      1. For Sale
    • $10
    • Tualatin
    • Oregon
    B5 System type 23 pistol grip. New. Never mounted. Went with FDE instead.
  8. M

    B5 drop in handgaurds

      1. For Sale
    • $15
    • Keizer
    • Oregon
    I have 2 B5 drop in handgaurds I don’t need one mid length and one carbine length both mlok and black 15$ firm No ship No trade
  9. ScottInPDX

    B5 Systems Type 23 Black AR Grip

      1. For Sale
    • $10
    • Tualatin
    • Oregon
    Bought this a while ago and just recently actually tried it out. I found that I don't like it as much as some others I've used so it can go, but it's too late for me to return.
  10. pewpewclint

    B5 Bravo stock

      1. For Sale
    • $45
    • Albany
    • Oregon
    B5 Bravo stock in new condition. Mil spec tube size $45
  11. pewpewclint

    B5 Bravo stock

      1. For Sale
    • $60
    • Albany
    • Oregon
    B5 Bravo stock. Very minimal use, like brand new. $60
  12. D

    STOCKS - BCM, Magpul, B5 Systems

      1. For Sale
    • $30
    • Tualatin
    • Oregon
    - Magpul CTR stock Gray, new in box. Comes with matching gray magpul grip used for a couple months. It looks black in the photo, but it's gray. $40. - BCM Mod 0 stock, black. Used very little. $30 - B5 Systems Bravo stock, black. Also used very little. $30 All fit mil-spec buffer tubes...
  13. 3isen

    B5 Systems Precision Stock-Coyote

      1. For Sale
    • $165
    • Vancouver
    • Washington
    I have a Coyote B5 Precision Stock up for grabs. It’s the Medium variant for usage with none folding 5.56 based rifles.
  14. Deadguyale88

    Areo Precision MOD M4E1 complete lower and upper set

      1. For Sale
      2. For Trade
    • $300
    • Portland
    • Oregon
    I have a complete lower and upper set with milspec stock and grip also milspec trigger by unbranded ar not a bad trigger for being milspec. Like to sell for $350 or trade for trijicon MRO. Standard carbine buffer and spring with 6 position buffer tube. Also I’ll throw in a B5 sopmod stock...
  15. CZrespecter

    Black B5 Pgrip 23

      1. For Sale
    • $10
    • Mulino
    • Oregon
    Used B5 type 23 pistol grip for AR-15 rifles. Lightly used older grip with no texture. Willing to meet in Vancouver for Washington buyers.
  16. Daredevil27

    B5 P-Grip 23 (New Take Off)

      1. For Sale
    • $13
    • Bellevue
    • Washington
    Like new. Came with lower, but I prefer a different grip. Selling for $15.00 $13.00. Will mail via USPS for an additional $5.00.
  17. Dalshakkamel

    FDE Aero M4E1 lower with law folder

      1. For Sale
    • $450
    • Gresham
    • Oregon
    I’m selling my aero lower that has a law folder, radian 45/90 selector, B5 stock & pistol grip, aero 2-Stage Nickel Boron Trigger, & a geissele buffer tube & super 42 braided spring with a H2 buffer. I’m selling to fund other projects. Price is $450 buyer pays transfer fee. I’m willing to...
  18. HLS1

    Lots of AR Parts - Stocks, Grips, Uppers, etc., All New

      1. For Sale
    • Oregon City
    • Oregon
    Quantities are current. I shut down my business last year and I'm getting rid of all my inventory. Check all my posts for all the parts. Everything is American made. No trades. I do not need any firearms, firearm parts, or ammo. Can take cash, Paypal, CashApp, and Venmo. Possible discount if...
  19. Shootingred994

    Aero complete lower

      1. For Sale
      2. For Trade
    • $269
    • Beaverton
    • Oregon
    I have a extra lower I’d like to off load. • Aero gen 2 •Aero LPK •Magpul Moe+ •B5 Bravo •Bcm buffer kit •Radian talon safety •Pws ratchet •Geissele maritime bolt catch
  20. Khalsa

    Sopmod Block 2 FrontSightPost RIS2 rail complete BCM rifle assembled by BCM. Features 16” Socom profile barrel, Daniel Defense RIS2 FSP. Bcm lower

      1. For Sale
    • $2750
    • Eugene
    • Oregon
    For reply text 5414809797 Complete “Sopmod Block 2” clone RIS2 FsP. Built by BCM. Near mint condition. Fired less than 500 rounds. This is a very nice rifle and has been utilized by USASOC for over a decade. Comes with SUREFIRE WARCOMP CLOSED TINE, B5 Sopmod enhanced buttstock. Knights...
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