Valken Tactical - Battle Machine SD Railed AEG - Black / Tan is an Airsoft 6mm BB Gun, based of the M4 / AR Platform, with a highly modified suppressed design. The gun features a Polymer Grip, Receiver, Grip, and Stock with an Alloy Barrel, Suppressor, Buffer Tube and Internals. The weapon has all the features of a modern Airsoft Weapon, with a Mil-Spec Buffer Tube, Version 2 Gearbox, and a Four Point RIS Rail Hand Guard. The weapon's Four Point Rail is a good addition as it allows the attachment of various Grips and Bipods, as well as a range of Torches and Lasers. The weapons Iron sights are of a Flip Up type, allowing them to be used as a backup should your main sight go down, and feature light enhancing fibre tube for low light conditions. The front of the Rifle features an Integrated Mock Suppressor, which is built onto the Outer Barrel to give the weapon a unique look which stands out against other weapons. The top of the rifle features a full length 20mm top RIS / RAS rail for attaching various sights and scopes. The stock is adjustable to up to six positions, and features a rubberised butt plate to prevent slippage. This Airsoft Gun is the perfect purchase for any Airsoft Skirmisher who wants a lightweight reliable gun, or for new Airsoft Skirmishers who are looking for a reliable AEG at a great price.