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Heckler & Koch MR556 A4 Upper Receiver Kit 5.56mm 11" Black Anodized - 51000385
Heckler & Koch

Heckler & Koch MR556 A4 Upper Receiver Kit 5.56mm 11" Black Anodized - 51000385

SKU: 51000385UPC: 642230270220
$2059.00$2499.00

MSRP: $2499.00

✕ Out of Stock

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Complete upper receiver kit for AR-15 style rifles chambered in 5.56 NATO/.223 Remington with an 11" barrel. Includes bolt carrier group, charging handle, buffer weight, buffer spring, and M-LOK handguard with Heckler & Koch's piston and pusher rod system design. Features anodized black finish, threaded 1/2x28 muzzle, and 1-in-7" twist rate.

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