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18 inch

The BL 18-inch Mk I naval gun was a breech-loading naval rifle used by the Royal Navy during World War I. It was the largest and heaviest gun ever used by the British. Only the Second-World-War Japanese 40 cm/45 Type 94 had a larger calibre, 18.1 inches (46 cm), but the British shell was heavier. The gun was a scaled-up version of the BL 15 inch Mk I naval gun and was developed to equip the "large light cruiser" (a form of battlecruiser) Furious. Its barrel length of 60' was 40 just calibers, slightly limiting its muzzle velocity.
Only three guns were built, but they did not see combat with Furious before they were removed from her and transferred to the Lord Clive-class monitors General Wolfe and Lord Clive for coast bombardment duties. Only 85 rounds were fired in combat operations before the war ended. All three were removed from service in 1920 and served as proving guns for cordite tests. Two were scrapped in 1933 and the last one survived until it was scrapped in 1947.

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Recent contents
  1. jerhine23

    Atheris 6.5 grendel 18 inch

      1. For Sale
    • $600
    • Milwaukie
    • Oregon
    Atheris 6.5 grendel 18 inch , guaranteed sub moa by manufacturer. Bought it few months ago, only 50 rounds down the pipe. Still looks like, just dusty.. With scope - $600 Without scope - $500
  2. Benelli1776

    WTB: Parkerized 18” (18 Inch) Barrel for Remington 870 Police Magnum

      1. Want to Buy
    • Salem
    • Oregon
    Edit: Updated from “blued” to “parkerized”. WTB Parkerized 18” barrel compatible with the Remington 870 Police Magnum. Wanted to get my feelers out to support the local community here first before I purchase on another site. I have seen barrels on eBay and other sites. Thanks all.
  3. Sasquatch702

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    • Vancouver
    • Washington
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  4. OldTusko

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    • Vancouver
    • Washington
    18” Ballistic advantage 416 stainless .224 Valkyrie barrel. 1:7 twist. $100 or best offer Brand new. Only fired 20 rounds through it. Only needs 6.8 spc bolt and magazines with barrel to convert to .224 valkyrie. Trying to cut down on my “wildcat” calibers.
  5. C

    KP 15 - 18 INCH 223wylde ar 15 build

      1. For Sale
      2. For Trade
    • $750
    • Sunnyside
    • Washington
    Selling my recently built 18 inch. Just too big of a length of pull and size. Shoots great but I can't move around with a heavy build, so testing the waters to see who was interested. Transfer is for the KE arms KP 15 lower receiver. So same day acceptance if you don't have a delay Parts list...
  6. L

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      1. For Sale
    • $700
    • Forest grove
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  7. Aero Denezol

    18" Free Floated Upper Receiver / Options for "DMR" build

    Other than PRI, BCM, and some of the really small niche builders, who else offers a *complete* 18" free floated upper assembly in .223/5.56x45? I see DSA used to offer one with KAC rail, but they are out of stock. Just trying evaluate some options. Doesn't have to be "clone correct" but I would...
  8. Koatle

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  9. Tack_Ryan

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      1. For Sale
    • $450
    • Lindale
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  10. Daredevil27

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      1. For Sale
    • $150
    • Bellevue
    • Washington
    $150 pick up. $160 shipped. About 400 rounds through this barrel. Extremely accurate, but I have another 18 inch .223 wylde so this rifle doesn't get used much. Swapping out parts for a 16 inch build. Rifle length gas tube & roll pin, flash hider, and new crush washer included. Does not...
  11. jerhine23

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      1. For Sale
    • $500
    • milwaukie
    • Oregon
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  12. jerhine23

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      1. For Sale
      2. For Trade
    • $500
    • portland
    • Oregon
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  13. A

    18 inch spr 223 wylde ar15

      1. For Sale
      2. For Trade
    • $1600
    • SCAPPOOSE
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  14. jerhine23

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      1. For Sale
      2. For Trade
    • $800
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    • Oregon
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  15. SPSharpshooter

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      1. For Sale
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  16. C

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    Purchased this for a build but decided to go in another direction. Only looking to get what I paid for it $645 cash, no trades at this time. Thanks for looking
  17. Andy54Hawken

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      1. For Trade
    • Everson
    • Washington
    Up for trade is a 1981 Remington Wingmaster. 12 gauge , with a 18 inch barrel and Improved Cylinder Choke , 2 3/4 chambered. Also comes with 240 rounds of assorted 12 gauge factory ammo. Bore is excellent as well as overall condition...Albeit with some light stock and finish wear. Trades wanted...
  18. Andy54Hawken

    1981 Wingmaster 12GA. 18 inch Barrel

      1. For Trade
    • Everson
    • Washington
    1981 Remington 870 Wingmaster. 12 gauge , 18 inch barrel , 2 3/4 chamber , Improved Cylinder choke. Excellent shape inside and out....albeit a small amount of stock wear and finish wear. Comes with 240 various rounds of factory ammo. ( Mostly #7 1/2 bird shot , some # 4 bird shot , a bit of #6...
  19. S

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      1. For Sale
      2. For Trade
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    • Washington
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  20. Jonathan

    18 Inch Billet AR

      1. For Sale
    • $700
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