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20rd

Third year type 20 cm/50 caliber guns (五十口径三年式二〇糎砲, gojūkōkei sannenshiki ni-maru centi-hō) formed the main battery of Japan's World War II heavy cruisers. These guns were also mounted on two early aircraft carriers. The typical installation was ten 20 cm/50 guns; although Tone-class cruisers carried eight while Furutaka and Aoba-class cruisers carried six. After modernization, Akagi carried only six.
These were built-up guns with an inner A tube, encased by a second tube, encased by a full length jacket. Early guns were partially wire-wound, but later guns dispensed with the wire winding. The guns were breech loaded with two cloth bags of smokeless powder. Third year type refers to the Welin breech block on this gun. Breech block design began in 1914 AD, the third year of the Taishō period. This breech block design was also used on Japanese 41 cm (16.1 inch), 15.5 cm (6 inch), 14 cm (5.5 inch), 12.7 cm (5 inch), and 12 cm (4.7 inch) naval guns.

View More On Wikipedia.org
Recent contents
  1. DedPyro

    CZ P10C - 20rd Magazines - 3 Left

      1. For Sale
    • $110
    • Hillsboro
    • Oregon
    3 magazines with Strike EMP baseplates installed. Extensions were for the P10F and had to be adjusted slightly to fit. Rear shelf had to be sanded a little. I think I had to round a corner at the base of the grip too. (See pictures) Magazine bodies are 15rd but also come with original +2 (17rd)...
  2. huntpotter

    Glock 43X 48 Shield Arms 15rd 20rd Magazine Bundle

      1. For Sale
    • $180
    • North Portland
    • Oregon
    Up for sale, north, Portland, Northeast Portland area. Shield Arms 15 magazine bundle. Fits Glock 43X or Glock 48. Includes: 3, S15 15 round 9mm magazines. 1, S15 20 round magazine. 15rd with +5 extension. 1, Shield Arms steel magazine catch. To replace the Glock plastic part. 4 mags, and...
  3. TigerBomb

    Sig 550, 553, pe90 mags 30rd and 20rd

      1. For Sale
    • $110
    • Lake Oswego
    • Oregon
    All un-notched and 20rd mags SOLD $110/ea 30rd, $100/ea 20rd shipped All brand new, never loaded or inserted. Have 7 notched 30rd, 6 un-notched 30rd and 4 20rd mags. Overbought due to impending legislation and need to free up some space. Not needing any trades at the moment. Thanks!
  4. abartpear

    CheckMate 20rd M1A Magazines NIB

      1. For Sale
      2. For Trade
    • $30
    • Medford
    • Oregon
    Selling packaged 20rd CheckMate M14/M1A Magazines. Never used. Will ship where allowed. Asking $30 each.
  5. abartpear

    Magpul 20rd PMags Gen 3

      1. For Sale
      2. For Trade
    • $15
    • Medford
    • Oregon
    Selling 20rd Gen 3 Magpul Pmags. Will ship where allowed. Asking $15 each.
  6. s75n

    Brownells AR-15 20rd Mags $8.49

    GIFT10 for $10 off $100 https://www.brownells.com/gun-parts/magazines/rifle-magazines-parts/ar-15-20rd-magazine-ss-223-5-56/?sku=078000160
  7. ScarceResource

    HK 416 22LR 20rd Magazines

      1. For Sale
      2. For Trade
    • $20
    • Portland
    • Oregon
    I sold the firearm to a buyer in WA and still have five (5) 20rd mags. P/N: HK 577612 These fit all of the Umarex-made 22LR rifles like the Beretta ARX160, etc. They do not fit CMMG or S&W 22LR ARs. Like-new condition and they all function flawlessly. Priced ea. I'd trade 1:1 for OEM G17...
  8. aljames

    S&W Factory 20rd magazine 59 series, Marlin Camp-9, Keltec $48 shipped

      1. For Sale
    • $48
    • Grants Pass
    • Oregon
    S&W factory mag but will also work in the Marlin Camp 9. Overall in excellent condition but does show a few small handling marks. Mag shown is the exact one that you will receive. Electronic or snail mail works too. $48 shipped where legal. Thanks for looking!
  9. 12-1791

    300BLK mag 20rd magpul for any 5.56 20rd or cash

      1. For Sale
      2. For Trade
    • $16
    • TIGARD
    • Oregon
    Accidently got one in 300BLK and opened it
  10. L

    WTB: BNIB RUGER SFAR 308WIN 16" MAGPUL MOE 20RD (#5610)

      1. Want to Buy
      2. Want to Trade For
    • Portland
    • Oregon
    Hi, I am looking to purchase a: RUGER SFAR 308WIN 16" MAGPUL MOE 20RD (#5610) *BRAND NEW IN BOX *NEVER FIRED *EVERYTHING IT CAME WITH - BOX, PAPERWORK, CLEANING TOOLS, ETC. (I have provided a photo below.)
  11. PocketSand

    Heckler & Koch HK P30/VP9 9mm 20rd Magazines - New - $40 Each

      1. For Sale
    • Albany
    • Oregon
    Bought more mags than I needed after M114 passed and am selling a few of my extras. I have 3 oem HK 20rd extended mags for the P30 or VP9, purchased new a few months ago and never used. Cash, Paypal F&F, and Venmo accepted. Willing to ship.
  12. aljames

    S&W 59 series 20rd factory magazine Hard to find

      1. For Sale
    • $58
    • Grants Pass
    • Oregon
    Preban S&W 59 series 20rd factory, blued body in very nice condition. $64 $58 shipped Mag is in nice serviceable condition. Pictures may show glare from flash and photo box. First I'll take it followed by an IM or email gets the goods. Thanks for looking!
  13. Dogfacedpony

    7.62x51 NATO PRVI PARTISAN 200gr Subsonic ammo - 20rd Boxes

      1. For Sale
    • $26
    • Brush Prairie
    • Washington
    PRVI Partisan factory loaded subsonic for your 7.62 or .308 This stuff is amazing. If you’ve not tried subsonic with your can, you’re missing out. 8 left Box of 20: $25ea. Part # PPS762 UPC #: 8605003810100
  14. DIYshooter

    Colt 20rd AR15 magazine

      1. For Sale
    • $20
    • Portland
    • Oregon
    Legit Colt 20rd Magazine for .223/5.56. I Found this among my other magazines and it has a pretty cool patina. I haven’t seen one of these in person in a long time, I image it would be a perfect compliment to anyone that has a retro style AR.
  15. aljames

    Ruger factory Mini-14 20rd magazine NEW in package

      1. For Sale
    • $34
    • Grants Pass
    • Oregon
    New never used in clamshell package. Residue from where I pulled off the gun store price tag. $34 shipped via USPS priority. Electronic or snail mailed payments work too. Pics available if needed. Pics are up! Thanks for looking!
  16. PocketSand

    Lot of 8x Magpul 20rd 7.62/.308 AR-10 PMags Gen M3 - New

      1. For Sale
    • $130
    • Albany
    • Oregon
    Went a little nuts on mags prior to M114 and ended up with more than I need. Just trying to make back close to what I paid - if you see these listed for less by a reputable retailer (Magshack, PSA, etc), let me know and I'll adjust the price. Selling 8 gen M3 AR-10 20-round Pmags, new in...
  17. spookshack

    Taylor Freelance Goliath plus 20 Basepad for Glock - Red

      1. For Sale
    • $40
    • Portland
    • Oregon
    Taylor Freelance Goliath plus 20 Basepad for Glock - Red. Spring included. See link below for more details. Please send me a PM for actual pics. $40.00 FTF - Innerr SE Portland. No shipping at this time. Thanks! https://taylorfreelancestore.com/goliath-glock-plus-20-basepad-red/
  18. Jargon Lingo

    .223 Remington 55 grain. Federal 5, 20rd boxes

      1. For Sale
    • $60
    • Salem
    • Oregon
    AMERICAN EAGLE 223 REM 55 GRAIN FMJ $12 A BOX. Would prefer to not split up. $60 for the 5 boxes. Thanks for looking. I live in West Salem.
  19. Jargon Lingo

    .30-06 Ammo. 12, 20rd boxes. Herter’s Select Grade

      1. For Sale
    • $480
    • Salem
    • Oregon
    HERTER‘S SELECT GRADE .30-06 Spgfld 150 gr SPCE Brass Case $40 a box = $480 total 12, 20 round boxes available. Would prefer to sell the lot and not break it up. Located in West Salem. I have other ammo listed. Check my profile for additional. Thanks for looking!
  20. A

    Glock 43x Shield Arms Gen 2 Magazines - 15 & 20rd

      1. For Sale
    • $100
    • Lake Oswego
    • Oregon
    Selling (2) Shield Arms Magazines (Powercron coating) Gen 2 for the Glock 43x - like new condition. Have (1) 15 round base magazine & (1) 20 round magazine (has +5 extension from Shield Arms) Asking $100 for the pair - willing to sell individually. Both magazines have been used for test firing...
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