If youâ€™re looking for a rear-wired gearbox for your airsoft rifle, the Echo1 M4 8mm Complete Gearbox is well-built and reliable. This gearbox, which is estimated to shoot up to 400 FPS with 0.20g BBs, is the same one designed in all Echo1 TROY and STAG-15 series AEGs. This sets you up with a high-performing gearbox for a variety of custom-build AEGs â€” or as a perfect replacement. However, unlike 6mm and even 7mm gearboxes, this complete Echo1 gearbox comes equipped with 8mm bushings for a beefy build designed to withstand high-stress and to increase energy efficiency. Featuring a reinforced gearbox shell for increased durability, this gearbox also features a ported piston that maximizes BB acceleration for shorter-barreled AEGs, making it perfect for most carbine-length rifles. Whether youâ€™re looking for a reliable gearbox for your airsoft rifle or want to replace an existing gearbox for improved durability and design, the Echo1 Complete 8mm AEG Gearbox is a perfect pick for most M4 and M16 airsoft rifles.
1X Echo1 8mm Version 2 Gearbox
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