Heckler & Koch is releasing the new MR A4 Series of modern sporting rifles. The MR556 A4 and MR762 A4 are the latest products released by HK-USA, with updated furniture and fully ambidextrous controls making it more user-friendly than ever before. A new lifetime barrel-bore guarantee, an HK first, reflects HK’s confidence in this no-compromise civilian product.
“Our testing has shown our proprietary cannon-grade steel barrels vastly outperform so-called mil-spec barrels in both accuracy and durability,” HK Director of Business Development Nathan Schueth said. “We’re so confident in our barrels that we now guarantee them for life. You shoot it out, we’ll replace it. Period.”
Schueth said HK tested the MR556 A4 head-to-head with a with a mil-spec, chrome-lined barrel to compare accuracy and durability. After 12,000 rounds, the HK experienced no degradation in accuracy, while the mil-spec competitor was shooting groups 2.5X larger than its baseline.
The updated MR rifles are feature-rich and now reflect the latest technologies included in the newest models of the select-fire HK416 and HK417 they are patterned after. A few key updates include a two-position adjustable gas block for shooting suppressed or un-suppressed, a new lower receiver with fully ambidextrous bolt catch and release buttons, magazine release buttons and 45-degree selector levers, along with a new slimline handguard and buttstock. The MR556 A4 will come in two barrel lengths: a 11.5-inch pistol configuration and a 16.5-inch rifle, while the MR762 A4 will ship with a 16.5-inch barrel.
MR556 A4 Rifle Specifications
- Caliber: 5.56 NATO
- Length (stock extended): 36.5 inches
- Length (stock collapsed): 33.25 inches
- Width: 3.97 inches
- Height: 7.5 inches
- Barrel Length: 16.5 inches
- Weight: 7 pounds, 11 ounces
- Trigger Pull: 4.5 to 5.6 pounds
- Barrel Profile: 6 grooves; 1:7-inch RH twist
MR762 A4 Rifle Specifications
- Caliber: 7.62 NATO
- Length (stock extended): 39.5 inches
- Length (stock collapsed): 35.50 inches
- Width: 3.23 inches
- Height: 7.5 inches
- Barrel Length: 16.5 inches
- Weight: 9 pounds, 13 ounces
- Trigger Pull: 4.5 to 5.6 pounds
- Trigger Type: Two stage trigger
- Barrel Profile: 4 grooves; 1:11-inch RH twist
- MSRP: $4,749 ($4,799 for CA compliant version)
MR556 A4 Pistol Specifications:
- Caliber: 5.56 NATO
- Length: 26.5 inches
- Width: 3.07 inches
- Height: 7.5 inches
- Barrel Length: 11 inches
- Weight: 105.8 ounces
- Trigger Pull: 4.5 to 5.6 pounds
- Barrel Profile: 6 grooves; 1:7-inch RH twist
- MSRP: $3,999
More information on the MR556 A4 and MR762 A4 as well as other products from Heckler and Koch is available at hk-usa.com.
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