LR: Underrated Weapons

[Iguana]

This topic is for weapons that are overlooked and/or underrated because they don't perform the way some players would like them to, despite the fact they have massive potential as great AC weaponry. I always see people suggesting the same stuff everyone else does such as RL, NIX, SHADE, etc. As I look over the designs people post, I notice how well some of the weapons that are seldom ever mentioned would go very well with them.

These are a few parts that come to mind:

-= RA2 (Right Hand AST Rifle) =-

Fast-firing AST rifle, decent ammo amount, above average shot velocity.

-= RS2* (Right Hand Sniper Rifle) =-

Decent equipping weight given the ammo amount, above average shot velocity.

-= G2 (Right Hand Grenade Launcher) =-

Lightweight for a GL, decent damage.

-= GOLEM* (Left Hand Sniper Rifle) =-

Somewhat heavy weight is compensated by increased damage and shot velocity.

-= SRSS (Left Hand Sniper Rifle) =-

Lightweight complimentary weapon, great for a variety of designs.

-= WL9SG* (Left Hand Grenade Launcher) =-

Specialized weapon, has decent weight, damage, stun, and heat.

-= DRAGON* (Left Hand Energy Rifle) =-

Specialized complimentary weapon with balanced overall stats, no ups or downs.

-= YASYA* (Dual Back Unit Orbital Cannon) =-

An extremely specialized complimentary weapon useable on few designs. Can be used as both a defensive and offensive weapon.

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Weapons with a '*' by their name are ones that I use on my staples.
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What weapons do you think are underrated?