Specna Arms / Rock River Arms Licensed CORE Series M4 AEG (Model: M4 Carbine Slim M-LOK / Black SA-C14)

Features Ultra lightweight fiberglass reinforced polymer receiver Licensed Rock River Arms logos Nylon fiber furniture Metal barrel assembly, flash hider, charging handle, and sling swivels ESA™ quick spring change system allows the spring to be changed without the need to disassemble your gun Rotary type hopup with 6.03mm tight bore barrel 380 fps spring pre-installed from factory, optional 310 fps (M90) spring included to reduce muzzle velocity Freefloat M-LOK slim handguard Specna Arms meets the expectations of clients by presenting the CORE™ line of products - an exceptional series of replicas that introduces a new quality to the market. An attractive price in combination with an innovative spring change system as well as high-quality materials make this replica suitable for beginners and seasoned airsoft players alike. The receiver, stock slide, handguard and a SF stock that holds the battery, as well as the pistol grip, were made from nylon reinforced polymer. Remaini