Bruce Vilas does a lengthy review of the Rossi M4 Neptune MARSOC-T 9" AEG which you can find at retailers in South America and Europe. The Rossi Neptune series presents a full-metal M4 MARSOC (Mk18) replica, equipped with a new Gen2 gearbox type that features a Quick Spring Change and a Rotary Hop-Up Chamber. This replica boasts a retractable telescopic stock that provides space for a battery, a free-float handguard, and folding sights. It also incorporates an electronic trigger, a high-speed motor, and a PMAG Mid-Cap magazine that can hold up to 120BBs.