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HK

HK 81001050 MR556 A4 5.56x45mm 30+1 11" Black Threaded Barrel, M-LOK Handguard, Black Picatinny Rail Receiver, Black Pistol Tube, Black Polymer Grip, Ambidextrous

Product Code : 642230269439

Mfg Item #: 81001050

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The MR556 A4 short-stroke gas piston operating system does not impart hot carbon fouling back into the action, allowing the weapon to run longer, with less maintenance and with less wear on internal components. Its adjustable gas regulator allows the operator to tune the action specifically for suppressed or unsuppressed operation. Fully ambidextrous controls, lighter weight and a slimmer profile make the new A4 easier to operate, manipulate and employ.

StockBlack Synthetic/ Adjustable
FinishBlack
SightsNo Sights
Capacity30+1
Model SeriesMR556
Barrel Length11
Overall Length26.5

Determined at checkout.

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Compliance with Local Laws: You are solely responsible for ensuring that any items you purchase are legal to possess, transfer, or purchase in your jurisdiction. This includes, but is not limited to, compliance with state and local laws such as Colorado’s 15-round magazine capacity limit and age requirements. It is your responsibility to verify that the products you are ordering meet all legal requirements before purchasing.

Restocking Fee for Non-Compliance: If your purchase cannot be legally shipped to your location due to non-compliance with local laws, a 10% restocking fee will be applied to your refund. This includes, but is not limited to, situations where you fail to meet the age requirements or laws restricting certain items (e.g., magazine capacity, firearms, ammunition).

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For customers purchasing in Colorado, please be aware that state law (Colo. Rev. Stat. § 18-12-302) prohibits the sale, transfer, or possession of large-capacity magazines exceeding 15 rounds of ammunition, with limited exceptions. To ensure compliance, we will block any magazine exceeding this capacity to limit it to 15 rounds. A fee of $15 will be charged for blocking up to 5 magazines per order. This fee covers the modification process to meet Colorado's legal requirements. Please contact us for additional details or if you have questions about your order.