Originally Posted by
sinister
As far as I know they were factory-roller bolts without hot-rod monkeying with different rollers.
Assuming you know this, but for everyone else, all rollers should be factory. After a long, long...long time larger rollers are used to bring MP5s with worn chamber recesses back into accepted standards of performance.
The only other times people fret about rollers is the clone crowd trying to correct for out of spec manufacturing.
There is the famous NASA MP5 (training gun) that went well over 500,000 rounds and rollers, and other small parts like extractors, were replaced over time before it was retired for performance issues. The MP5 design definitely has redundant extraction features. There are several instances of MP5s that proved to have broken extractor springs that were still cycling because of fluted chambers.
It's hard to be a ACLU hating, philosophically Libertarian, socially liberal, fiscally conservative, scientifically grounded, agnostic, porn admiring gun owner who believes in self determination.
Chuck, we miss ya man.
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