King Arms SIG556 HOLO RAS Blowback AEG Non-Slip and with their 2014 version

and with their 2014 version

Steel Housing 300 rounds Loading capacity Magazine

- Adjustable Hop up System

Full Metal Construction except the ABS texture Grip

King Arms SIG556 HOLO RAS Blowback AEG Non-Slip and with their 2014 versionTactical RAS Railed Handguard for 556 HOLO 7mm Bearing Gear Box with Brand New Designed Bolt Carrier Operating Mechanism One Piece Metal Outer Barrel Ambidextrous Selector Railed Flat Top for scope and red dot sight Stylish Flip Up Front Sight & Low Profile Flip Up Rear Sight 135 Rounds SIG556 Nylon Fiber Magazine (Also compatible with M4 M16 Magazine) Compatible to Other Brands Reinforce Parts (Except the Piston & Nozzle) Trademark of SAN, Licensed