Quis custodiet ipsos custodes?

Image Source: https://upload.wikimedia.org/wikipedia/commons/5/55/APS_underwater_rifle_REMOV.jpg
Intent: To give people a chance to deal with ridiculously overarmored scrubs.
Development Thread: N/A
Manufacturer: Defiance Consolidated Multipurpose Manufacturing
Model: Emeritus Needler
Affiliation: Sith Empire
Modularity: No
Production: Mass Production
Material: Stamped titanium, hydrogen(gas), non-corrosive plastic(flechette body), depleted uranium-tungsten alloy(flechette tip), fluoroantimonic acid(flechette contents)
Classification: Slugthrower(technically)
Size: Handheld
Length: 0.84m with stock out, 0.62m with stock folded
Weight: 3.9kg
Ammunition Type: Flechette and gas canister
Ammunition Capacity: 30 shots
Effective Range: 200m
Rate of Fire: Semi-auto
Special Features: The weapon's flechettes are filled with extremely corrosive acid. The weapon itself is nearly silent due to its method of operation.
Description: The Emeritus Needler is a weapon designed to deal with those enemies who have ended up more heavily armored than most. With such energy-resistant foes as those layered with cortosis, or beskar, or enough layers of durasteel to make a Terminator happy, a weapon was, as was inevitable, developed.
The magazine of the Needler uses a high pressure gas canister in concert with thirty pre-packed flechettes. In operation, once a flechette has been loaded into the weapon's sealed, a spurt of gas is released behind a piston and ignited, soon ramming it forward and compressing the air at such a high speed that the flechette reaches significant velocity upon exiting the barrel - so high a speed that the projectile will likely hit its target before they can hear the sound of the shot. The piston then recoils, ejecting the gas with a soft hiss out the right side of the weapon as another flechette is reloaded.
The flechettes in question are made of a non-corrosive plastic, tipped with an alloy of tungsten and depleted uranium. This allows a degree of penetration at their medium velocity of roughly a kilometer per second. Upon impact, the flechette will fracture, depositing its cargo of fluoroantimonic acid(one of the most corrosive substances known to man) in the armor. Being so extremely corrosive, the metal(or other material) will begin to be eaten away - the flesh of the enemy too, if the wound is deep enough. It won't instantly bore massive holes through the armor, but it will cause the armor damage after more than several seconds.
Being that this is a fresh design, the weapon has some teething problems. If the flechettes are fiddled with prior to being loaded in the weapon, there is a very small change that the piston will effectively blow the frontal half of the gun off due to misalignment. As well, seeing that the flechettes are not finned, they lose their accuracy well within their maximum effective range.
Original Section(s):
New Section(s):
Manufacturer: Emeritus Industries
Affiliation: Galactic Republic
New Section(s):
Manufacturer: Defiance Consolidated Multipurpose Manufacturing
Affiliation: Sith Empire