Performed well during a full days use in skirmish play. Benefit is the mag which has stripper clips, and there's an option to use fewer mags while getting extra strip clips. They swap out in 20 seconds. Longer if someones firing at you. hop up is easy to adjust with a hex key. This system is a propietary PROW MWS system and TM MWS parts dont swap in. Only WG13-comptible parts. OEM Nozzles are available so long-term use is assured. The FPS adjustment screw was threadlocked but soaking the nozzle in just-boiled-a-minute-ago water for 40 seconds loosened it and adjustment to 1.3J was easy. Was just at field limit of 1.48 out of box so I dialled it down a tad. Very light, as it is polymer, so not as rigid as metal, but easy to run all day. Great price.