HK MR556 A4 Semi Automatic Rifle 5.56x45mm NATO 16.5" Black Threaded Barrel Matte Frame Black Stock Pistol Grip 20+1

UPC: 642230269415 MPN: 81000828 SKU: 85682670

HK Mr556, Hk 81000828 Mr556 A4 16.5" 1-10r 223 Rem | 5.56 Nato Rifle (10-Round)

Name: HK Mr556, Hk 81000828 Mr556 A4 16.5" 1-10r 223 Rem | 5.56 Nato Rifle (10-Round)
Brand: HK
SKU: 85682670

Rifle Semi-auto HK SKU: 85682670 In StockOnline Only

$3,749.00

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Compare all offers for HK MR556 A4 Semi Automatic Rifle 5.56x45mm NATO 16.5" Black Threaded Barrel Matte Frame Black Stock Pistol Grip 20+1 (642230269415)

Quick Specs

Caliber -

Capacity 10+1

Insight Snapshot

MidwayUSA lists this offer at $3,749.00.

HK MR556 A4 Semi Automatic Rifle 5.56x45mm NATO 16.5" Black Threaded Barrel Matte Frame Black Stock Pistol Grip 20+1 anchors the Rifle segment in the firearms catalog, giving shoppers a clear baseline before purchase.
Chambered in 223 Rem | 5.56 NATO, it keeps ballistics predictable across practice and defensive loads without forcing you to rework your kit.
Factory materials note a semi-auto action, which influences recoil timing and maintenance cadence.
Standard capacity lands at 10 + 1, so plan your range loadout around how often you expect to top off.

Shopping Tips

Line up your receiving FFL early and clarify their transfer fees so you are not surprised at pickup.

Ownership Checklist

Confirm the receiving FFL is ready for the transfer and understands the model you are purchasing.
Review Not found, Not found requirements on storage, transport, and waiting periods before the firearm arrives.
Source 223 Rem | 5.56 NATO practice ammunition early; popular loads tighten in supply when prices drop.

Common Questions

What specs should I know before buying HK Mr556, Hk 81000828 Mr556 A4 16.5" 1-10r 223 Rem | 5.56 Nato Rifle (10-Round)?

Key callouts include caliber: 223 Rem | 5.56 NATO, action: Semi-Auto, capacity: 10 + 1. Scroll up for the full specification table before you commit.

HK headlines the specification sheet for this platform. Factory literature categorizes it as a modern sporting rifle, which frames expectations for handling and use. Factory chambered in 223 Rem | 5.56 NATO, built around a semi-auto action with a 10 + 1 round capacity to keep performance predictable from shot to shot. Dimensional notes call out a barrel length of 16.50" in and overall length measuring 36.50" in, helping you plan cases and storage. Unloaded weight settles near 7.67 lbs, which influences recoil management and carry options. Furniture is trimmed in synthetic with a black finish, giving the rifle its classic profile. Metalwork wears a cerakote treatment, pairing durability with period-correct styling. Stock appointments include smooth furniture without checkering and a fitted recoil pad. Overall dimensions ship at 4.60 X 13.80 X 43.70, so plan case and safe clearance accordingly. Magazine system uses a detachable design, making reloads faster between strings. Without a hinged floorplate you will cycle rounds out manually when clearing the rifle.