It is definitely recommended, unless you want to spend a decent amount of time loading BBs one by one every time you run out. Some low capacity and medium capacity magazines do require a speed loader for reloading, but I highly recommend high capacity magazines because they can hold around 350 BBs on average and do not require you to load every few shots. You can just drop BBs by the handful into them or use a speed loader, funnel, etc. If you do not already have a Hi-cap magazine, you can get one for around 15$ on OKorder or at a airsoft retailer of your choice. But, to go back to the original question, most of the time you do not need one, they just make loading a whole lot easier so you can spend most of your time shooting people.
