A direct descendant of the world-famous HK416 / HK417, the MR556A1 / MR762A1 is the commercial carbine from the same DNA. It offers the battlefield-proven reliability, durability and precision you would expect from a rifle that bears the name Heckler & Koch. 

 

Available Models

Features

Features

MR556A1

The MR556A1 is assembled in the USA using US and German-made components and uses many of the same parts and assemblies developed for the HK416.

 

Like the HK416, the MR556A1 uses a proprietary HK short-stroke gas piston in place of the direct-gas-impingement system found on lesser AR15-style rifles that propels exhaust gas into the upper receiver to operate the action.

 

In the “closed” HK piston system, exhaust gasses never enter the receiver, which means the HK runs cooler, cleaner and more reliably.

 

When adverse conditions, like dust, sand and mud are introduced, the advantage of the HK system becomes even more drastic. That is why so many of the world’s elite military and law-enforcement customers have absolute trust in their HKs.

 

The MR556A1’s barrel is cold hammer forged from the highest quality cannon-grade steel. It has a 1 in 7” twist and a taper-bore configuration, with a slightly smaller diameter at the muzzle for improved accuracy and velocity. And while the material and cold hammer forging process themselves greatly enhance durability, HK’s processes include many additional steps not taken by other manufacturers to produce superior accuracy and service life, ensuring performance well beyond “mil-spec.”

read more

MR762A1

Like its 5.56 mm counterpart, the MR762A1 is a direct descendent of the HK416/417 series, only in a semi-automatic rifle configuration developed for civilian users. It is assembled in the USA using US and German-made components and uses many of the same parts and assemblies developed for the legendary HK416 and 417.

The MR762A1 uses a proprietary HK short-stroke gas piston in place of the direct-gas-impingement system found on lesser AR15-style rifles that propels exhaust gas into the upper receiver to operate the action. In the “closed” HK piston system, exhaust gasses never enter the receiver, which means the HK runs cooler, cleaner and more reliably. And when adverse conditions, like dust, sand and mud are introduced, the advantage of the HK system becomes even more drastic. That is why so many of the world’s elite military and law-enforcement customers have absolute trust in their HKs. 

 

The MR762A1 has a cold hammer forged barrel made from the highest quality cannon-grade steel, producing a barrel that ensures superior accuracy, even after firing thousands of rounds. And while the material and cold hammer forging process themselves greatly enhance durability, HK’s processes include many additional steps not taken by other manufacturers to produce superior accuracy and service life, ensuring performance well beyond “mil-spec.”

read more

MR762 LRP III

Taking an essentially standard MR762A1 (caliber 7.62 x 51 mm NATO) semi-automatic rifle, Heckler & Koch USA turns it into a more effective precision rifle by an astute addition of the right optics and accessories. A Vortex Viper PSTII 3-15×44 FFP MRAD, HK G28 adjustable cheekpiece buttstock, and LaRue Tactical BRM-S bipod are the primary add-ons that make the MR762A1 Long Rifle Package (LRP) more than a sum of parts.

Like its 5.56 mm counterpart, the MR762A1 is a direct descendent of the HK416/417 series, only in a semi-automatic rifle configuration developed for civilian users. It is assembled in the USA using US and German-made components and uses many of the same parts and assemblies developed for the legendary HK416 and 417.

 

The MR762A1 uses a proprietary HK short-stroke gas piston in place of the direct-gas-impingement system found on lesser AR15-style rifles that propels exhaust gas into the upper receiver to operate the action. In the “closed” HK piston system, exhaust gasses never enter the receiver, which means the HK runs cooler, cleaner and more reliably. And when adverse conditions, like dust, sand and mud are introduced, the advantage of the HK system becomes even more drastic. That is why so many of the world’s elite military and law-enforcement customers have absolute trust in their HKs.

 

The MR762A1 has a cold hammer forged barrel made from the highest quality cannon-grade steel, producing a barrel that ensures superior accuracy, even after firing thousands of rounds. And while the material and cold hammer forging process themselves greatly enhance durability, HK’s processes include many additional steps not taken by other manufacturers to produce superior accuracy and service life, ensuring performance well beyond “mil-spec.”

read more

Key Features

MEDIA

Videos
Images

SPECS

MR556

Dimensions

Caliber: 5.56 x 45 mm
Stock Extended Length: 37.68 in.
Stock Retracted Length: 33.90 in.
Width: 3.07 in.
Height: 9.45 in.
Barrel Length: 16.5 in.

Weight

Weight (with empty magazine): 8.60 lb

Other Specifications

Magazine Capacity: 10 / 20 rounds
MR762

Dimensions

Caliber: 7.62 x 51 mm
Stock Extended Length: 39.10 in.
Stock Retracted Length: 35.94 in.
Width: 3.23 in.
Height: 8.39 in.
Barrel Length: 16.50 in.

Weight

Weight (with empty magazine): 9.84 lb.

Other Specifications

Magazine Capacity: 10 / 20 rounds
MR762 LRP III

Dimensions

Caliber: 7.62 x 51 mm
Stock Extended Length: 40.50 in
Stock Retracted Length: 36.50 in.
Width: 3.23 in.
Height: 8.39 in.
Barrel Length: 16.50 in.

Weight

Weight: 10.42 lb.

Other Specifications

Magazine Capacity: 10 / 20 rounds

Available Configurations

ModelsUPC CodesDescriptionMSRP
MR556 Rifle, 5.56mm, Optics Ready - supplied with one magazine, rifle length M-LOK handguard, and medium contour barrel
81000579642.230.262.553MR556, 5.56mm, Optics ready, 16.5" medium contour barrel, one 30rd magazine3,499
81000580642.230.262.560MR556, 5.56mm, Optics ready, 16.5" medium contour barrel, one 10rd magazine3,499
MR556 Spare Magazines and Accessories
81000584642.230.262.607MR556, Upper Receiver kit - includes bolt, buffer, buffer spring, rifle length M-LOK handguard and 16.5" medium contour barrel assembly2,069
251770S642.230.248.311MR556 5.56mm 30rd magazine (steel)59
233609S642.230.245.334MR556 5.56mm 20rd magazine (steel)69
235642S642.230.246.492MR556 5.56mm 10rd magazine (steel)69
236204642.230.247.642MR556 9" quad rail handguard379
50233617642.230.247.635HK416 11' handguard416
51000223642.230.262.157MR556 9" M-LOK handguard, black289
51001100642.230.262.683MR556 12.5" M-LOK handguard, black299
MR762 Rifle, .762mm, Optics Ready - supplied with one magazine, M-LOK handguard, and medium contour barrel
81000586642.230.262.584MR762, 7.62mm, Optics ready, 16.5" medium contour barrel, one 20rd magazine4,129
81000587642.230.262.591MR762, 7.62mm, Optics ready, 16.5" medium contour barrel, one 10rd magazine4,129
MR762 LRP (Long Rifle Package III) Rifle, 7.62mm - supplied with two magazines, M-LOK handguard, and fully assembled in hard case
81000498642.230.261.655MR762, 7.62mm, Long Rifle Package III, Vortex Viper PSTII three 15x44 FFP MRAD, LaRue/Harris bipod, adj. G28 buttstock, Blue Force Gear sling and mount, one 20rd and one 10rd magazine7,249
81000499642.230.261.648MR762, 7.62mm, Long Rifle Package III, Vortex Viper PSTII three 15x44 FFP MRAD, LaRue/Harris bipod, adj. G28 buttstock, Blue Force Gear sling and mount, two 10rd magazines7,249
MR762 Spare Magazines and Accessories
234708S642.230.247.321MR762 7.62mm 20rd magazine59
234690S642.230.247.314MR762 7.62mm 10rd magazine59
235870642.230.249.837MR762 14.7" quad rail handguard399
51000224642.230.262.164MR762 14.7" M-LOK handguard, black319
51000225642.230.262.676MR762 14.7" M-LOK handguard, FDE339

Find a Dealer

Premium Stocking Dealer
Stocking Dealer
Indoor Range with HK Rentals
Law Enforcement Dealer
  • 1
    Mi
    FULL AUTO FIREARMS (MR. MONEY WHARTON LLC)
    301 N MECHANIC ST
    EL CAMPO TX 77437
    Phone: 979-543-7296
    Premium Stocking Dealer
  • 2
    Mi
    LEVY PAWN & GUN
    4401 MACARTHUR DR.
    NORTH LITTLE ROCK AR 72118
    Phone: 501-753-72222
    Premium Stocking Dealer
  • 3
    Mi
    Black Dog Shooting Supplies
    162 N. Main Street
    Rutland VT 05701
    Phone: 802-342-0187
    Premium Stocking Dealer
  • 4
    Mi
    Gable Sporting Goods
    6250 Fairburn Rd
    Douglasville GA 30134
    Phone: 770-942-5397
    Premium Stocking Dealer
  • 5
    Mi
    Tactical Police Gear LLC
    1555 Highland Ave
    Cheshire CT 06410
    Phone: 203-439-8899
    Premium Stocking Dealer
  • 6
    Mi
    C & S Shooting Sports
    4923 Rivers Ave
    North Charleston SC 29406
    Phone: 843-991-6067
    Premium Stocking Dealer
  • 7
    Mi
    FREEDOM WEAPONS LLC
    2601 N ZARA GOZA RD
    EL PASO TX 79938
    Phone: 915-472-9912
    Premium Stocking Dealer
  • 8
    Mi
    BROTHERHOOD ARMS (DOUG’S ANCHOR MARINE INC)
    1560 N HWY 20
    WATERTOWN SD 57201
    Phone: 605-878-4867
    Premium Stocking Dealer
  • 9
    Mi
    RAZORBAK OUTDOORS (DENISON ENTERPRISES)
    701 S MAIN ST
    READING MI 49274
    Phone: 517-283-3614
    Premium Stocking Dealer
  • 10
    Mi
    Machine Gun America
    5825 W. Irlo Bronson Memorial Hwy
    Kissimmee FL 34746
    Phone: 407-507-6256
    Premium Stocking Dealer