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. The carrying handle and detachable rear sight is placed on top of Picatinny railings. 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. The rifle's front handguard is of a ribbed design, with heat ventilation holes. This design improves barrel cooling in situations when sustained fire is performed. The SS2's barrels were originally produced in Germany before Pindad switched to South Korean-made barrels due to arms embargo problems at the time. The charging handle is on the right side of the SS2 with the fire/safety selector on the left side with provision for single and full auto fire alongside safe mode. Upper and lower receivers are made from aluminum alloy and are connected via cross pins. A new rifle based on the SS1, being replaced in the Indonesian military after tests had been conducted from 2003–2005. It has been adopted by Indonesian security forces in 2006. It has a carrying handle that can be replaced with a scope for scope mounting on a Picatinny rail and a side-folding stock. It is the only rifle variant that the Pindad SPG-1A underbarrel grenade launcher can be used. There's a Heavy Barrel version (SS2-V1HB) being marketed  A carbine version of the SS2-V1. There's a Heavy Barrel version (SS2-V2HB) being marketed  Carrying handle replaced with a Picatinny rail for scope mounting as a designated marksman rifle. Said to be for the use of Indonesian special forces. The front sight has been removed and the barrel lengthened and accurized to improve accuracy. There's a Heavy Barrel version (SS2-V4HB) being marketed, which is meant to shoot at 600 meters. A compact version of the SS2-V1. Unveiled at the Indo Defence & Aerospace exhibition in 2008. A sub-variant of the SS2-V5, these are produced for BRIMOB forces. These were publicly unveiled in 2012. A sub-variant of the SS2-V5, these are produced for Kopassus forces. These were publicly unveiled in 2012. Launched in May 2016, the SS2-V7 is a subsonic variant intended to be used in special forces operations when stealth is required through the use of a mounted suppressor.