If you still want help, I'd reccomend the Tokyo Marui P90. It is BY FAR the easiest gun I have worked on. Two screws and the gearbox slides out, and you don't have to mess with an annoying trigger. You can remove the barrel in two secconds (I timed myself). And you can get one with a built in red dot for the same price. The only catch is that magazines and pouches are hard to find sometimes, but Gearbox had some new mags for only $20. For the price of $250, its a great gun. HOLD IT BEFORE YOU BUY IT.