The RIA 313 is a sidearm introduced in SAS: Zombie Assault 4. This sidearm, like most other pistols, is found at an early level. The damage is higher than both the CM 202 and HVM 001, making it even more viable for later levels. It still struggles with the problems of a normal pistols, being as the pierce is one making it almost useless on normal crowds of zombies. It also has the Physical damage type, making it hard to kill shielders and other zombies with Chit. Hide on them. Overall this weapon is good for normal matches, can last a little while in Multiplayer unlike other starter pistols, and can kill slightly faster than SMGs and other pistols found at its level.
This pistol also has a brother, the RIA 1010, in which share many traits. This weapon, while boasting higher damage and availability, has the downsides of being Semi-auto and less clip size. The RIA 1010 also has a mini movement penalty of -3%, making it harder to move top speed for those speed runners. This weapon can replace most pistols at its level, and can be used to solo the lowest level matches, but is not recommended for using as a main weapon for Multiplayer matches. It is a decent early-mid range pistol that can be used well into the levels that you get higher end [RED] pistols.
RIA 313 is a futuristic pistol that looks like an M9 pistol with bulky size, a large muzzle & a pair of re-designed sights.
Oddly, the RIA 313 fires rockets in the mobile version.
But in version 1.4 (1.4 for android), one of the Bug Fixes claims it no longer fires rockets.
It is also one of the few weapons that has a change in stats other than damage and ammo cost, with the RIA 313's case being that capacity is increased.
This weapon's silhouette is used when you don't have a weapon equipped in the Pistol slot.