HK MR762 A4

HK MR762 A4 Overview and Specifications

The HK MR762 A4 is a high-performance 7.62 NATO/.308 semi-automatic rifle, celebrated for its precision engineering by Heckler & Koch. It’s outfitted with advanced features, making it a premium choice for professional shooters, law enforcement, and enthusiasts. Introducing Heckler and Koch’s all new MR762, the HK MR762 A4 Gas Piston 7.62/308 AR10 Rifle with new M-LOK Rail and adjustable two-way gas block. The HK MR762-A4 308 AR10 Semi Auto Rifle is out fitted with Heckler and Koch’s new cold hammer forged cannon grade steel 16.5-inch barrel. HK did a head-to-head 12,000-round barrel test between a Mil-spec chrome-lined barrel and their new cannon-grade steel barrel. Their new cannon-grade steel barrel outperformed the Mil-spec chrome-lined barrel in both accuracy and durability. After 12,000 rounds the Mil-Spec chrome lined barrel groups opened up 2.5 times larger than its starting base line and the HK experienced no degradation in accuracy. Furthermore, HK stands behind their new barrel so much, that the HK MR762-A4 7.62 AR-15 Rifle comes with a lifetime barrel warranty, so if you shoot out the barrel they will replace it for free.

Key Features and Benefits:

1. Barrel and Accuracy:
   • Material: Hammer-forged cannon-grade steel for unmatched durability.
   • Lifetime Warranty: Ensures replacement if the barrel wears out.
   • Testing: After 12,000 rounds, it retains accuracy, outperforming standard chrome-lined barrels.
2. Operating System:
   • Short Stroke Gas Piston: Keeps internal components cool by directing fouling gases away.
   • Adjustable Gas Block: Features two modes—Normal and Suppressed—accessible through a knurled roller dial.
3. Design and Ergonomics:
   • Ambidextrous Controls: Includes magazine release, bolt catch/release, and a 45° selector.
   • Handguard: M-LOK compatible for modular attachments.
   • Telescoping Stock: Offers nine adjustable positions for user comfort.
4. Specifications:
   • Barrel Length: 16.5 inches with 1:11 twist.
   • Weight: 9.84 pounds.
   • Trigger Pull: 4.5 – 5.6 pounds.
   • Magazine Options: Available in 10 or 20-round capacities.

HK MR762 A4 (Specifications)

• Manufactures Item Number: 81000829, UPC: 642230269453 (HK MR762 A4 20 Rd)
• Manufactures Item Number: 81001056, UPC: 642230269729 (HK MR762 A4 10 Rd Compliant Model)
• Caliber: 7.62 NATO – 308 Win
• Length: 35.50 – 39.5 inches
• Barrel Length: 16.5 inches Hammer forged Cannon Grade Steel Barrel (Life Time Warranty on Barrel Life)
• Barrel Twist: 1:11 inches, 4 lands/grooves
• Operating System: Short Stroke Gas Piston – Adjustable two position gas black
• Controls: Full Ambidextrious
• Sights: No Sights, Optics Ready Picatinny Rail
• Trigger Pull: 4.5 – 5.6 pounds
• Weight: 9.84 pounds
• Handguard: New M-LOK
• Stock: HK 9 Position Telescoping
• Magazine: One 20 Round or One 10 Round For Compliant Model