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HECKLER & KOCH MR556-A1 5.56X45MM NATO
Guns International #: 103276275 Seller's Inventory #: 569313
Category: Heckler & Koch Pistols - AR15 Rifles
Seller's Information
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Seller: Guns Dot Com
Member Since: 9/8/21
State: Minnesota
Zip: 55337
Country: United States
Phone: (866) 582-4867
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Number of Active Listings: 44231
Total Number of Listings: 371734
Seller: FFL Dealer
Return Policy: 3 day inspection and return policy on used guns.
CERTIFIED USED GUNS Guns Certified Used Guns may be returned within 3 days after the transfer is complete for any reason for a full refund, minus any fees, shipping costs and a 15% restocking fee. A Guns Certified Used Gun may also be returned within 7 days if it is malfunctioning with proper use. NON-CERTIFIED USED GUNS Non-certified used guns can be returned if there is a mechanical defect that occurs within 3 calendar days of the physical transfer of the firearm to your possession. All other reasons for returns on non-certified used guns are ineligible.
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Description:
Guns Listing ID: 569313
Heckler & Koch MR556-A1 – 5.56x45mm NATO SEMI-AUTOMATIC RIFLE
The Heckler & Koch MR556-A1 is a semi-automatic rifle chambered in 5.56x45mm NATO, designed to bring H\&K’s military-grade engineering and reliability to a modern sporting/duty platform. Built for precision, durability, and reliable function in demanding conditions, the MR556-A1 is well suited for tactical use, training, and versatile range applications.
Constructed with a forged aluminum upper and lower receiver and a cold-hammer-forged chrome-lined barrel, the MR556-A1 features a short-stroke piston operating system (derived from the HK416 family) for clean, reliable cycling. The rifle incorporates a full-length Picatinny top rail for optics, modular M-LOK / handguard attachment options (depending on configuration), flip-up backup iron sights, and ambidextrous controls for user versatility. Its robust gas system, quality barrel, and balanced ergonomics provide consistent accuracy and dependable operation under extended use.
Engineered for serviceability and battlefield-proven performance, the MR556-A1 emphasizes low maintenance, reliable extraction/ejection, and shooter adaptability. Its 5.56x45mm NATO chambering, piston system, and rugged construction make it a premium choice for users who demand proven durability and consistent function.
Specifications
Model: Heckler & Koch MR556-A1
Caliber: 5.56x45mm NATO
Action: Semi-automatic, short-stroke gas piston
Barrel Length: Approx. 16.5 inches (cold-hammer-forged, chrome-lined)
Overall Length: Approx. 33–36 inches (stock dependent)
Height: Approx. 8.5 inches (varies with sights/optic)
Width: Approx. 2.5–3.0 inches
Capacity: 30+1 rounds (standard)
Trigger: Single-stage (mil-spec style)
Weight: Approx. 7.5–8.5 lbs (unloaded, configuration dependent)
The Heckler & Koch MR556-A1 in 5.56x45mm NATO offers piston-driven reliability, premium barrel construction, and adaptable ergonomics in a rugged semi-automatic rifle. Built for demanding use and long-term durability, it delivers consistent accuracy and dependable operation across tactical, training, and sporting applications.
NOTE: COMES WITH H&K SOFT CASE
Price: $2,500.99
Manufacturer: HECKLER & KOCH
Model: MR556-A1
Caliber Info: 5.56X45MM NATO
Condition: Used - Non-Certified
Barrels: 16.5" BARREL
Action: SEMI AUTOMATIC
Finish: blk