OK then, i had a deep fire M4 of new hop-up style, first i test the whole Deep Fire AEG, the company say it will shoot more far then the other AEG, but it seems the same shooting range. then i dissolve the Deep Fire AEG and change the whole hop-up set into the G&P AEG,KA AEG and the Marui AEG, all type of AEG cannot fit it without any modification. After modifiy the hop-up set then it can fit for the G&P only. But it seems even worst then the old style hop-up set. So is it still worth? OK then i use the Deep Fire Gear, it is really hard enough but the buttom gear which contact with the motor dissolve itself after shooting for 3000rounds. So it is reliable? That's ok too, then I use the Deep Fire inner barrel for PTW, it comes with the hop-up set, but after install it seems that the hop-up set is useless as there is no hop-up for adjust. Is all of the above my unlucky? Not i want to say the worst for the Deep Fire but just want to tell them that they still need to work more hard, as too less people know this brand also need to arise their quality.