Перестрелка с полицией с жертвами / сотрудник применил оружие :: PoliceActivity :: полиция сша :: видео (video)

Я так думаю это зависит от типа стрелка. Если как в США - поставил в шкаф на всякий случай и забил - то выбираешь тот что в целом скорее дешевле. Если спортсмен и стреляешь несколько тысяч (или десятков тысяч) выстрелов в год - то все равно ствол надо менять чаще - выбираешь и аппер дешевле (в пределах разумного) и патрон подешевле, щадящий и с меньшей отдачей.

Ещё много букв:

You're correct that a 5.56x45mm NATO upper can generally handle both .223 Remington and 5.56x45mm NATO ammunition, offering greater versatility. A .223 Remington upper, on the other hand, is specifically designed for .223 Remington ammunition.

One potential reason to choose a .223 Remington upper over a 5.56x45mm NATO upper could be if you have a specific firearm configuration or personal preference that aligns better with .223 Remington ammunition. This could include factors like:

1. **Barrel Twist Rate:** Some firearms are optimized for accuracy with certain bullet weights and lengths. If your .223 Remington upper has a barrel twist rate that performs exceptionally well with a specific bullet weight used in .223 Remington ammunition, you might prefer to maintain that configuration for consistent accuracy.

2. **Specialized Use:** If you have a particular use case that benefits from the characteristics of .223 Remington ammunition, such as precision shooting or varmint hunting, a .223 Remington upper might be more suitable. The slightly lower chamber pressure of .223 Remington could offer better precision in these scenarios.

3. **Compatibility with Existing Parts:** If you have existing components or accessories that are optimized for .223 Remington, such as magazines or optics, it might make sense to stick with a .223 Remington upper to ensure compatibility.

4. **Regulatory Considerations:** In some regions, there might be regulations or restrictions on the use of 5.56x45mm NATO firearms. If this is the case, a .223 Remington upper could provide compliance with local laws.

5. **Personal Preference:** Some shooters have personal preferences for specific chamberings due to factors like recoil, noise, or familiarity. If you prefer the characteristics of .223 Remington ammunition for your shooting activities, that could be a reason to choose a .223 upper.

In summary, while a 5.56x45mm NATO upper offers versatility and compatibility with both .223 Remington and 5.56x45mm NATO ammunition, there might still be scenarios where a .223 Remington upper is preferred due to factors like specialized use, accuracy optimization, or personal preference.

неадекватов бесполезно уговаривать и что-то объяснять. хотя могли бы ей закинуть слезогонки.