One of the most important points of SAYS in Battlefield 4 is the customization of weapons, enhanced greatly with the triple configurable accessories than BF3, and more expansion slots available for each weapon. Just to give an example, a single assault rifle will have no less than 240,000 different customization combinations, and this without taking into account aesthetic ones as the skin.

The developers have released a video he shows us some of these possibilities of customization: I'll show you below.