Yo, gun enthusiasts! 🚨 Heckler & Koch just dropped some 🔥 new upper receiver kits for their slick MR556A4 rifles. If you’re not looking to splurge on a whole new gun, these uppers are your golden ticket. They slide right onto any standard AR lower, even the older MR556 models. So, go ahead and upgrade your setup without breaking the bank. Second Amendment flex, anyone? 💪
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