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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. C

    DuraMag AR10/ SR25 20rd

      1. For Sale
    • $200
    • Portland
    • Oregon
    10 DuraMag AR10 magazines for 308/6.5 creedmoor. Eight of them new in package two of them out of package and only used one once in a buddy’s rifle and worked great. $200 for the lot or if paired with my Aero M5 receiver set I’ll knock of $50. Meet inner east side. Link to Aero M5 ad...
  2. titsonritz

    STI/Staccato 9mm 20rd Mags

      1. For Sale
    • $150
    • Salem
    • Oregon
    -SPF- Brand new in the package, never used. STI/Staccato 9mm/.38 Super 140mm double stack mags. Prefer FTF sale in South Salem, will ship on your dime just not to prohibited states. $150 for all three. Regarding shipping, sorry I don't have any of the payment apps. I can do a USPS MO, personal...
  3. ethanww94

    4 20rd Magpul LR/SR25 mags

      1. For Sale
    • $70
    • Milwaukie
    • Oregon
    4 20rd Magpul LR/SR25 mags $70 for all 4. Local pickup only.
  4. coolio5k

    Price lowered again. 210 rds of SwissP 300 BLK Ammo.66CPR

      1. For Sale
    • $140
    • Dallas
    • Oregon
    210 rds of SwissP 300 BLK HV LF Styx Action 108gr Ammo $140 that's .66cpr. and a free ammo can The following is the product link and 3 links testing it https://www.reddit.com/r/300BLK/s/ON8rCpufDL https://www.reddit.com/r/300BLK/s/jVfBcsGPBx https://www.reddit.com/r/300BLK/s/03oMOM4buE...
  5. C

    SKS 10 pocket chicom rig fits AR metal 20rd mags!

    Several posts elsewhere in the wastelands of the internet have commented that some SKS 10 pocket rigs are too tight for 20rd metal AR mags, and some are perfect. Well I picked this up at a Goodwill Outlet bin for $2.46... deals are out there ;) I think its post Vietnam? Markings way too faded...
  6. D

    Steel 20rd 308 AR MAG

      1. For Sale
    • $15
    • Canby
    • Oregon
    Came with my Del-Ton 308. I’m running Pmags and don’t use it. $15
  7. Jbsheepdog

    Canik mete 20rd mags

      1. For Sale
      2. For Trade
    • $80
    • Washougal
    • Washington
    20rd mags $80 for all 3
  8. Flat45

    Beretta 92fs 20rd magazine (1)

      1. For Sale
      2. For Trade
    • $30
    • Portland
    • Oregon
    I have a 20rd magazine for Beretta 92FS that I acquired when I purchased a CX4. I have since converted the CX4 to take PX4 mags. The previous owner said he only shot a few hundred rounds through it. It appears to be like new. Sorry, no Washington buyers.
  9. MrSteez

    27 boxes, 20rd Norinco China .223

      1. For Sale
      2. For Trade
    • $300
    • Spokane Valley
    • Washington
    27 boxes of Yellow Box, Brass case non corrosive Norinco china .223. 540 rounds total 300 For all Revised: will consider trades 10oz in denominated silver, 545x39, 308, parts, or? Pickup in Spokane Valley
  10. Nwcid

    20rd aluminum AR mag springs

    I am looking for a cost effective source for springs for the 20 round aluminum magazine like those made by Colt and showing in the image I pulled from the internet. The only source I can find is Wolf extra power spring and they are $5/each when bought in packs of 10. The problem is I have a...
  11. expand_applaud

    [SPF] Aluminum AR Mags 30rd & 20rd $5ea

      1. For Sale
    • $5
    • Eugene
    • Oregon
    [Sold Pending Funds] No shipping
  12. Barfly

    Question about 20rd Hungarian "Tanker" AK mags

    I was digging through some bins out in the garage and came across some 20rd Hungarian AK mags. I know that typically there is the half moon w/ face stamp or some variation of zeros and twos. These mags, with the exception of one, only have a circle with an M stamped on the spine. Ever seen...
  13. jebediah

    7mm rem mag 70.00$ 4 20rd. Boxes.

      1. For Sale
      2. For Trade
    • Springfield or.
    • Oregon
    4 boxes 80rds. 70.00$
  14. 12-1791

    20rd 308 pmag for 10 rd

      1. For Sale
      2. For Trade
    • $22
    • Tigard
    • Oregon
    A 20rd for a 10rd r
  15. Treeline81

    Wanted- FNAR .308 20rd mags

      1. Want to Buy
      2. Want to Trade For
    • Portland
    • Oregon
    I’m looking for this miracle, er, magazine- FN FNAR .308 / 7.62x51mm 20-Round Factory Steel Magazine MPN: 3108929210 UPC: 818513006125 I’ve been tasked with tracking one down to finish a family heirloom. My initial search shows them discontinued and described as ‘unobtainable unicorns.’...
  16. AR_PSYCHO

    Sig P226 9mm 20rd magazines

      1. For Sale
    • $100
    • Beaverton
    • Oregon
    Hey Gang, I have 3x - 20rd P226 9mm magazines made by Mec-Gar. Used but not abused, no issues with their performance. If you are unfamiliar with Mec-Gar, they are a common OEM handgun magazine manufacturer. These mags are as good as Sig factory mags. These guys...
  17. ethanww94

    Sig P322 20rd mag

      1. For Sale
    • $35
    • Milwaukie
    • Oregon
    2 Sig P322 20rd mags local pickup only. $35
  18. Richo877

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      1. For Sale
    • $0
    • Wilsonville
    • Oregon
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