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Posted: 7/5/2016 9:18:42 PM EDT
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How often does the extractor spring need to be pulled and
clean under the extractor? This is on 9mm SBR's, sometimes suppressed. Also how often on a 91? Thanks |
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I would venture not until you start having extraction/ejection issues. That spring is basically the weak link of the roller-locked world, so the less it gets messed with the better I think.
The weapons are designed to work when cruddy so I doubt HK would require the extractor to have a higher standard for cleanliness then the rest of the rifle. |
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Can't imagine anything remotely often. When I got my MP5/40 I shot 700-1000rds per session & it was never an issue. Everywhere else would be much more visibly dirty..shooting suppressed really ups the ante [visibly] though.
When I shot that much I'd throw it all in an ultrasonic tank after, I'm lazy, then wipe clean (most parts NP3'd), because I'm used to humid environments where rust is prevalent. |
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