Fans of the SIG 556 enjoy an affordable option with the not-so-new CYMA SIG 556 AEG, as reviewed by Mach Sakai. This AEG, a customized version of the SG551 for the American market, features standard rails on the handguard and receiver, allowing for easy installation of various accessories. This high level of expandability makes it a very versatile model. Key features include a total length of 855mm - 930mm, a weight of 3630g, a metal frame, a 300-round magazine, a Mini connector, and an 8.4v Nickel-metal hydride AK battery (sold separately) stored within the handguard. It boasts an Ambi selector, Full/Semi-auto firing modes, and a Variable Hop-Up system.