The SS2 is an upgrade of the Pindad SS1, being a licensed version of the FN FNC. The SS2's flash suppressor is based on that of the Colt M16A2, and it has a reciprocating charging handle that can be used for forward assist, with the front sight being based on the AK rifles.[19][20] The carrying handle and detachable rear sight is placed on top of Picatinny railings.[19] Most of the SS2 rifle variants can have its carry handle removed in order to gain access to its picatinny railings to install various optics.[