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The ICS M4/16 series utilize 7mm bearings, I'm pretty sure my MP5 takes 6mm bearing. However, the ICS bearings are copper, so it should be sufficient for most upgrades to a PDI 150% (which IMO is the "classic" maximum in a spring).
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Originally Posted by [DI]DeathSniper
Fucking bullshit. I just checked my flyers and I didn't get no 'Cluepons'. Assholes :rrr:
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