Never field. Shot it a few time in my garage and next saw another daylight till now. Full metal receiver and barrel assembly, full metal M-LOK PDW 6.5" handguard VFC ECS gearbox with inline wired MOSFET Stamped VFC trademarks QRS ergonomic motor grip with aggressive texturing provides a reliable grip VFC QRS PDW stock, QRS enhanced trigger guard Railed upper receiver prefect for optics Mock bolt catch for easy hopup adjustment Quick change spring system Battery extension piece included for larger batteries