The Heckler & Koch MR556 A4 is a precision-engineered semi-automatic rifle chambered in .223 Remington/5.56 NATO. Featuring a 16.5″ barrel, this AR-platform rifle delivers exceptional accuracy and durability. With a sleek matte black finish and a 10-round magazine capacity, the MR556 A4 is ideal for both tactical and sporting use.
The MR556 A4 employs a proprietary short-stroke gas piston system, derived from the iconic HK416, ensuring superior reliability and reduced fouling for easier maintenance. Its cold hammer-forged barrel enhances accuracy and extends barrel life, while the free-floating handguard offers improved handling and customization options with ample Picatinny rail space.
The rifle features ambidextrous controls, making it convenient for both right and left-handed shooters. Its adjustable stock provides ergonomic comfort, and the optics-ready design allows users to mount their preferred sighting systems.
UPC
642230269415
Action
SEMI AUTOMATIC
Finish
BLACK
Sights
OPTIC READY
Weight
7.67 LBS.
Caliber
5.56X45MM NATO
Capacity
10 ROUNDS
Barrel Length
16.5″ BARREL
Threaded Barrel
YES
WARNING! This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. For more information: www.p65warnings.ca.gov
FFL Transfer & Firearms Laws for HECKLER & KOCH MR556 Rifles Semi Auto
All firearms, including the HECKLER & KOCH MR556 Rifles Semi Auto, must be shipped to a licensed Federal Firearms License (FFL) dealer.
You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
Place your order online.
Provide your preferred FFL dealer information.
We ship the firearm directly to your FFL.
You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the HECKLER & KOCH MR556 Rifles Semi Auto is legal in your state.
Some states may have restrictions on certain firearm models or features.
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy HECKLER & KOCH MR556 Rifles Semi Auto from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy HECKLER & KOCH MR556 Rifles Semi Auto?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is HECKLER & KOCH MR556 Rifles Semi Auto available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
All firearms, including the HECKLER & KOCH MR556 Rifles Semi Auto, must be shipped to a licensed Federal Firearms License (FFL) dealer.
A background check and any required local paperwork must be completed before you can take possession.
How It Works
Place your order online.
Send us your preferred local FFL dealer info.
We ship the firearm to your FFL after verification.
Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the HECKLER & KOCH MR556 Rifles Semi Auto is legal in your state.
Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
