I like some advice with my gen 8 m4a1 im building and wanted to know about what advantages does it have to have less teeth or more on my piston ladder please can some explain how it works i have alittle idea but need more info
You need to stay with the amount of teeth the standard Gen8 piston runs.
If you get a piston with more tooth count than the original, it can wind the piston too far back and lock up the gearbox 
Short stroking/removing teeth is more of a science in regards to the build parts within the whole gearbox.
It’s not required for general use blasters, only if there’s issues found with PME in extremely high ROF builds.
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