https://technical_translator_dictionary.academic.ru/132284/н...

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Note added at 2 hrs (2023-10-24 09:53:21 GMT)
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One example of such a semi-automatic carbine is the Soviet designed SKS carbine. This weapon, once a standard in the Soviet army, is also utilized by many European and Asian countries. Carbines of East German, the People's Republic of China, North Korean and Yugoslavian manufacture are currently available in the U.S. marketplace under various designations.
The SKS type carbine has a stock with a vertical through-hole adapted to receive and be covered at its top by a barrel and receiver, at its rear underside by a trigger mechanism, and at its forward underside by the original-equipment magazine. The original-equipment magazine of the firearm has a "clamshell" configuration utilizing a pair of magazine halves connected at a forward pivot site. The upper half of the original-equipment magazine is retained within the stock by various components. The lower half of the original-equipment magazine pivots to allow its interior to be accessed for unloading purposes, cleaning purposes, or the like. A spring-biased magazine retaining latch supported on the trigger mechanism engages a rear portion of the lower half of the original-equipment magazine to retain the original-equipment magazine in a closed configuration during use. Manual sliding of the spring-biased magazine retaining latch rearwardly allows the lower half of the original-equipment magazine to pivot downwardly, thereby opening the magazine.
The original-equipment, clamshell magazine of this weapon holds ten cartridges but is not designed to allow rapid reloading of the rifle. The original-equipment magazine engages a forward fixed attachment site and is secured within the firearm by the trigger mechanism. This prevents the removal of the magazine without the prior removal of the trigger mechanism and thus prohibits the use of preloaded replacement magazines for rapid reloading. Instead, it is necessary to manually reload the original-equipment magazine each time it becomes empty. This is tedious and can create danger for a soldier in a battle setting where it is often desirable to fire more than ten rounds in rapid succession.
https://patents.google.com/patent/US5416998


Для быстрого наполнения неотъёмного магазина на 10 патронов используется обойма. Для использования обоймы на затворной раме имеются специальные направляющие. По израсходовании патронов, при пустом магазине, после последнего выстрела затвор становится на затворную задержку, что снижает время на последующее пополнение магазина патронами. Из-за нарастающего сопротивления пружины и чрезмерной длины изогнутости обоймы обойменное заряжание требует определённых навыков, иначе на восьмом патроне может возникнуть задержка. Патроны следует вдавливать, нажимая как можно ближе к обойме, и следить, чтобы она не прогибалась вперед.
https://ru.wikipedia.org/wiki/Самозарядный_карабин_Симонова