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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. Xotter143

    Pro Mag 12g 20rd Drum Magazine.

      1. For Sale
    • $100
    • PORTLAND
    • Oregon
    What you see is what you get. Not entirely sure which model of shotgun this is for but I'm sure the person buying it will know. I got this in a trade some time ago and never did anything with it.
  2. M

    gen2 or gen 1 scorpion 20rd mags

    • Salem
    • Oregon
    I’m looking for old scorpion 20rd mags ideally two of them and for a decent price.
  3. Bolt_308

    Lancer 20rd L5AWM Warfighter FDE AR mags- $7.99

    I mean, if you dont already have like 50 of them, stock up buttercups! Now is the time- buyers market, prices are low, have a little more time before any Oregon ban. Dont wait and then look back on these golden days of long ago when you could buy such mags for so cheap!! ;-)...
  4. ethanww94

    H&K VP9A1 15rd and 20rd mag

      1. For Sale
    • $50
    • Milwaukie
    • Oregon
    H&K VP9A1 15rd and 20rd mag. Local pick up $50
  5. Grasshopper541

    PMAG AR10 Gen M3 20rd Mags

      1. For Sale
    • $13
    • Bend
    • Oregon
    Selling 20rd Gen M3 AR10 Pmags. Chambered in 308/7.62x51. In brand new condition, never been used. $13 a mag, I am selling 8 of them.
  6. fredball

    FN five seven 5.7x28 20rd magazine N.I.B.

      1. For Sale
    • $35
    • Vancouver
    • Washington
    1. FN five seven 20 magazine NEW IN THE BOX Not looking for any trades at this time Must be picked up in Vancouver PLEASE MAKE ALL QUESTIONS OR COMMENTS IN A PRIVATE MESSAGE NO AMMO CANS INCLUDED IN SALE
  7. Barfly

    WTS NEW stainless steel 20rd SR25/LR308/.308 AR platform magazines

      1. For Sale
    • $20
    • Olympia
    • Washington
    I have (14) (11) (6) 20 round steel .308 AR mags available. $20 ea. For sale where still legal. I am happy to ship to you, on your dime.
  8. Grasshopper541

    M14/M1A 20rd Mags

      1. For Sale
    • $20
    • Bend
    • Oregon
    Selling my M14/M1A 20rd mags made by Checkmate. They have never been used. I have 5 of them that I’m selling for $20 each. I will ship.
  9. Dans_Militaria

    Federal/Remington 30-30 150gr & 170gr 20rd boxes

      1. For Sale
      2. For Trade
    • $25
    • Tigard
    • Oregon
    I have 360rds of 30-30 ammunition that is all factory new and stored in ammo cans with oxygen absorbers. All ammo is in great shape but I recently sold my 30-30 lever action and no longer need the ammo to go with it. I have; 11x 170gr Federal Powershok 1x 150gr Federal Powershok 1x PPU 170gr 4x...
  10. JV87

    308/7.62x51 50rd drum

      1. For Sale
    • $100
    • Beaverton
    • Oregon
    Sold my ar10, no longer need these. 1x 50rd 308/7.62x51 drum brand new, never loaded $120 $100 4x 20rd Pmag 308/7.62x51 mags SOLD Pickup in Beaverton
  11. MuhIzzys

    Duramag 7.62x39 - 20rd AR Magazines

      1. For Sale
      2. For Trade
    • $156
    • Corvallis
    • Oregon
    Hey folks, Got a MCX, ARAK21 or a bastard AR47 that you need extra mags for? Well you're just in luck with these brand new in package freedom dispensers. I entertained the idea of building one myself but that kinda fizzled out realizing I'm better off just doing another AK type rifle lmao...
  12. aljames

    5 Preban USGI Colt 20rd Universal magazines alloy followers

      1. For Sale
    • $109
    • Grants Pass
    • Oregon
    5 Pre ban USGI 20rd straight mags. 3 have Colt 5.56 floorplates, 1 has Colt .223 and 1 is Universal marked. All 5 bodies have the CI or UI marked bodies. I got these with a rifle that I purchased used and I'm already flush on this style of mag. Mags aren't perfect but I tried to price them...
  13. BattleReadyBunny

    KCI AK47 20rd mags (10x)

      1. For Sale
    • $50
    • Vancouver
    • Washington
    Price: $50 Location: Vancouver/Washougal, WA I have 10qty new in zip lock bag, KCI (Korean made) AK47 20rd mags. I bought them from J&S a while ago because I like the look of 20rd mags. Paid $50 + $20 shipping + tax. I’d like to get $50 for 10 of them. Never used, never taken out of the zip...
  14. 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...
  15. 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...
  16. 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.
  17. 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...
  18. 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...
  19. 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
  20. Jbsheepdog

    Canik mete 20rd mags

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