HK MR556 A4 SBR

Introducing Heckler and Koch’s all new HK MR556 A4 SBR, this latest HK MR556 SBR features a two way adjustable stroke gas piston system, HK cold hammer forged cannon grade barrel, new M-LOK Rail and HK collapsiable stock. Its cannon grade steel barrel is designed to out perform Mil-spec chome lined barrels. 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. HK's new cannon grade steel barrel out performed 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 cannon grade steel barrel experienced no degradation in accuracy. Also, HK stands behind their new barrel so much, that the new HK MR556 5.56 AR-15 SBR comes with a lifetime barrel warranty, so if you shoot out the barrel they will replace it for free.

The HK MR556 A4 SBR's gas piston system is super easy to access, it's two way adjustable gas key protrudes out of the front of its M-LOK hand guard for easy access. Its gas key has both Normal - Suppressed settings and its adjustment roller dial is knurled for adjustment. HK's short stroke gas piston system is designed to redirect all of the hot dirty fouling gasses out of the receivers and through the front gas block, keeping all of the Rifles internal cool to the touch, even after prolonged rapid - full auto fire. Furthermore, this HK MR556 is fully ambidextrous, including its 45 degree selector, Mag Release, Bolt catch - Release, with a choice of a 30 Round or 10 Round magazine. So if your looking for the ultimate HK AR-15 5.56 SBR? Look no further, Their all new HK MR556-A4 SBR will not disappoint.

Come Shop our huge in stock selection of HK Rifles and Pistols Online or in Store at Xtreme Guns and Ammo in Texas, Including their all new HK MR556 A4 SBR. You can also call one of our HK Experts at 832-363-3783 to place your order over the phone or to answer any Heckler and Koch Questions you might have. You to busy to call? you can also chat with us online via our chat function. Still looking for something different? Shop More HK Rifles and Pistols 24/7 Online

• HK MR556 A4 SBR is a Class 3 Item, All NFA Rules Apply
• HK MR556 A4, 11 inch Barrel, 30 Round, Manufactures Item Number: 81001048, UPC: 642230274112
• HK MR556 A4, 11 inch Barrel, 10 Round, Manufactures Item Number: 81001049, UPC: 642230274129
• Caliber: 5.56 NATO
• Length: 26.5 inches
• Barrel: Hammer forged Cannon Grade Steel Barrel (Life Time Warranty on Barrel)
• Barrel Twist: 1:7 inches, 6 lands/grooves
• Operating System: Short Stroke Gas Piston - Adjustable two position gas block
• Controls: Full Ambidextrous
• Rail: Optics Ready Picatinny Rail
• Trigger Pull: 4.5 - 5.6 pounds
• Handguard: New M-LOK
• Stock: HK Collapsible Stock
• Magazine: One 30 Round or One 10 Round
• Weight: 6.61 pounds