With a moderate rate of fire, it is generally used to slice through weak groups of zombies at range. It is found pretty early in the game and is easily the weakest, but most common, sniper rifle. It deals a solid 750 damage with 3 pierce, killing many, if not all, non-boss zombies early-mid game with 1-3 shots, as long as they are not Shielders or physical resistant.
It appears to be a downgrade of the Sub-Light COM2 in every aspect except the reload time.
The RIA 50 is a fairly common sniper rifle, being rather easy to get with many augment slots compared to other sniper rifles, and is not bad at all for early-mid game.
RIA 50 is a futuristic sniper rifle based on the Sako TRG-42 with a compensator fitted. However, RIA 50 is a full-auto sniper rifle, which explains why it don't have a bolt like its inspiration.
Difference on Mobile:
RIA 50 on Mobile has a larger barrel.
Augments are straight forward for this weapon, being the trinity of Deadly, Overclocked, and Adaptive for common useful ones.
The reload time is decent for a sniper (or any weapon for that matter) so having Race Modded or Capacity isn't needed, as you'll normally have a good reload speed at the level that the one appears. Also, adding Capacity won't do much, as the magazine size is pretty low.
The pierce is high for a low level weapon, and can deal with crowds well when used right, so Piercing isn't needed either.
It already does a high amount of damage per bullet for a weapon, and giving it Deadly will increase it, and Overclocked to help deal with the already decent firing speed. Adaptive helps with the gun since it deals physical damage, and will help with Shielders as well.
For all its faults, this weapon comes with one nifty little advantage over the other snipers; its early game availability allows the player to start the sniper masteries early, and when they find a Hornet or HIKS S300, they will already have many of the powerful buffs of the sniper masteries.
Ever since the 9/23/2015 Patch, both the RIA 50 and the RIA 30 Strikeforce were made full auto and their fire rates were doubled, and as such, There are no longer any semi-auto weapons that can be overclocked normally.
Recently, as of 9/30/2015, both the RIA 50 and Strikeforce were nerfed back to the stats before 9/23/2015.
As of 10/5/2015, the previous nerf was reverted back to 9/23/2015's patch.
The version from the mobile has more red painting than the PC.