I would like to leave both clips loaded so I can quickly arm my M9, however I'm wondering if this will sack the magazine spring over time. What's the best practice here?
yes generally, but if you keep something compressed for extremely long periods of time its form will deteriorate.madecov said:Generally
Leaving a magazine loaded has no effect on springs. It's when you constantly load and unload a magazine that springs get fatigued. Leaving the magazine either fully loaded (spring compressed) or unloaded (uncompressed) has no effect.
springs are designed to provide energy. when they are at rest they are fine.