I noticed on the clip my hi-capa 4.3 that the spring tension directly affects the slide lock mechanism. Brand new, the spring had enough tension to push the actual slide catch upwards. After having the mag loaded for a few days (for no reason), the spring no longer carried enough strength to push the slide lock upwards, thus rendering the catch mechanism inoperable.
Bottom line: don't leave the spring compressed when not required :salute:
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