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 …

The featured HK proprietary gas piston operating system replaces the typical gas tube found in AR15, M16, and M4 style firearms. A practically flawless weapon system, the H&K MR556A1 …

Also in AR-15: Upper Parts; Lower Parts; Complete Kits; Lower Build Kits & Parts Kits; Pistol Kits; Rifle Kits; Bolt Carrier Groups; Magazines; 300 Blackout; Meme Lowers; Shop all AR-15 ... HK …

Buy discounted HK Rifles for sale online at Omaha Outdoors. Shop a large selection of in stock HK Rifles manufactured by Heckler and Koch (HK).

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Our collection of AR-15s for sale feature high-quality parts and accessories designed for performance. Shop AR-15 rifles at Sportsman's Outdoor Superstore.

H&K AR rifles for sale online or in-store at Sportsman's Warehouse. Shop a full selection of AR-15 rifles manufactured by H&K.

Omaha Outdoors offers the Heckler and Koch MR556 AR 15 rifle in 10 and 30 round variations, as well as a competition model for high intensity shooters. Heckler and Koch is a world …

Jan 16, 2025 · Shop Guns.com to find Heckler & Koch rifles for sale, including the popular MR556 and MR762. We offer new and used semi-automatic options, rock-bottom deals on Outlet …

HK MR556 A4 Rifle 8100027. Semi automatic AR15 rifle chambered in 5.56/.223 with 16.5" cold hammer forged barrel.