I'll second the KJW M9. As T7 said, the mag catch does wear out rather fast though. Mine wore out and I had to reverse the catch to left hand configuration until I get a new one.
KSC Glocks are kickass too. My G17 is a beast. It's only performance upgrade is a tightbore barrel. It's killer accurate and I outrange some shorter AEGs with it. It's been my main pistol since I got it.
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