Alright, since you're stateside, it'll be much easier/cheaper to get GBBRs, save for WETTI M4s since the ATF is funny like that and made it illegal to buy them/import them. My best suggestion, KJW M4, but you'll be dropping 400$ for that after shipping and that ish, and then you'd to have to get the Flip-Up sights yourself, which are rather cheap though
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What idiot called them Black Bears instead of African Abearicans