A magazine loader for loading ammunitions in magazines is provided, the magazine loader comprising a body including a first plurality of openings for inserting ammunitions in the magazine loader, the first plurality of openings including a first intervening distance therebetween, and a second opening for loading ammunitions in a magazine, when the magazine loader is used in conjunction with the magazine, an adaptor in the body, the ammunitions transiting through the adaptor distancing the ammunitions from the first intervening distance to a second intervening distance different than the first intervening distance of the first plurality of openings, a plurality of channels inside the body for receiving therein ammunitions, when the magazine loader is used in conjunction with a plurality of ammunitions, the plurality of channels being generally spaced apart with the second intervening distance.