{"@context":"https://schema.org/","@type":"Product","@id":"https://www.scheels.com/p/hk-mr556-a4-5.56x45mm-nato-rifle/1309-81000827/","name":"HK MR556 A4 5.56x45mm NATO Rifle","image":["https://scheels.scene7.com/is/image/Scheels/64223026940"],"description":"Just like the real HK 416, the HK MR556 A4 features the same slimline furniture with a thin handguard and M-LOK attachment points. It also f","sku":"64223026940","mpn":"64223026940","brand":{"@type":"Brand","name":"Heckler & Koch"},"offers":{"@type":"Offer","url":"https://scheels.com/p/64223026940/","priceCurrency":"USD","price":3749.99,"itemCondition":"https://schema.org/NewCondition","availability":"https://schema.org/InStock"}}{"isError":false,"data":{"reviews":[]},"tracing":{"frontasticRequestId":"f7d65debd617cd6f50643e66ecaa348d"}}"Full Description:\nJust like the real HK 416, the HK MR556 A4 features the same slimline furniture with a thin handguard and M-LOK attachment points. It also features the HK proprietary gas piston operating system found on the HK 416, employing a piston and a solid operating 'pusher' rod in place of the gas tube normally found in certain firearms. This method of operation virtually eliminates malfunctions that are common to direct impingement gas systems since hot carbon fouling and waste gases do not enter the receiver area. This is the same key feature critical to the success of the HK416 rifles used by leading military and law enforcement customers. Other features of the HK MR556 A4 include an "over the beach" style buffer tube with drainage ports and a double length reinforced castle nut.\n\nFeatures:\n\u003cul>\n\u003cli>Heavy profile barrel\u003c/li>\n\u003cli>M-LOK attachment system\u003c/li>\n\u003cli>Gas-piston system\u003c/li>\n\u003cli>Ambidextrous Safety\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>Caliber: 5.56 NATO\u003c/li>\n\u003cli>Weight: 7.67 lbs\u003c/li>\n\u003cli>Rifle Overall Length: 36.5" - 33.25"\u003c/li>\n\u003cli>Action: Short Stroke Gas Operated\u003c/li>\n\u003cli>Trigger: 4.5 - 5.6 lb\u003c/li>\n\u003cli>Safety :Ambidextrous AR Selector\u003c/li>\n\u003cli>Rifle Barrel Length: 16.5"\u003c/li>\n\u003cli>Rifle Barrel Twist: 1:7"\u003c/li>\n\u003cli>Barrel Thread Pitch: 1/2x28"\u003c/li>\n\u003cli>Rifle Stock: Collapsible Stock\u003c/li>\n\u003cli>Scope Mount: Picatinny Rail\u003c/li>\n\u003cli>Magazines Included: (1) 30-Round Mag\u003c/li>\n\u003cli>Iron Sights: No\u003c/li>\n\u003cli>Caliber or Gauge: 5.56 x 45mm NATO\u003c/li>\n\u003cli>Handedness: Ambidextrous\u003c/li>\n\u003c/ul>\n"