Tokyo Marui - HK417D 7.62mm Airsoft Rifle - Black is an accurate replica of the HK417D made by Heckler and Koch, and features TM's own Electronic Recoil Shock System giving the weapon an Electronically Powered Blowback Mechanism. The rifle is constructed mainly from Alloy, with an Alloy Outer Barrel, Hand guard, Body, Buffer Tube, Internals, Ironsights and a Polymer Pistol Grip, Stock, Pistol Grip, Hop-Up Unit. The Main Body of the weapon is constructed from Aluminium, giving it a heavyweight and highly realistic feeling. The rifles Recoil Shock System is specifically designed by Tokyo Marui for their weapons giving it simulated recoil, and features a Bolt Stop System and Magazine Empty Detection System, meaning the rifle will stop firing when the magazine is empty, and to begin firing again the bolt release is pressed to give the weapon a more realistic feel. The weapon features a full length top rail, allowing the attachment of a wide variety of 20mm RIS / RAS Rail supporting Sights, and even has more than enough room to fit great looking Magnifier and Red-Dot Sight Setups. The Front Hand guard doubles up as a Four Point 20mm RIS / RAS Rail Hand guard, allowing the attachment of a huge variety of Aftermarket Grips, Torches, Lasers and Launchers, as well as a 14mm Counter Clockwise threaded Outer Barrel allowing for the attachment of Suppressors and Tracer Units. The Rear of the weapon features a Four Point Adjustable Crane Style Stock, with a Concave Rubberised Butt Plate to prevent slippage. The Stock is also where the Unique SOPMOD Style TM Batteries are stored, with a Simple Push Fit design allowing batteries to be changed quickly and easily. This rifle is perfect for those who are looking for a Marksman Style Rifle, which looks and feels great, with all the hallmark quality build and design by Tokyo Marui. This rifle is also great for those who are chasing realism, due to its simulated Electric Recoil System and mock Bolt Lock Empty System.