What does weight bb does it shoot at 400-500 fps? (that's a huge range btw). Any if the gearbox is out, why not just drop a weaker spring into it to get it to shoot close to or at 350fps?
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The Tier One Tactical Operator
Tippmann Arms M4A1
KWA USP .45, KJW P226, KJW hi-cappa
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