The PLX-2M portable missile launcher, also known by names such as the Plex-Twoem or simply Plex, was a shoulder-fired missile launcher manufactured by Merr-Sonn Munitions, Inc.. It was developed as an evolution of their earlier PLX-1 design. The PLX-2M's immense destructive capability made it unwise to fire indiscriminately in confined spaces, yet it proved exceptionally effective as a 'smart' weapon with tracking capabilities. Once a target was acquired, the missiles fired from the PLX-2M could reach targets up to 50 kilometers away.

The PLX-2M's magazine held six Arakyd Industries 3t3 missiles, and it incorporated a small repulsorlift generator to make carrying this heavy weapon easier. Various missile types could be used, including anti-vehicle armor-piercing rounds, explosive "bunker busters," gas delivery systems, and GAM guided missiles.
Furthermore, this weapon featured a holographic heads-up display that supplied the operator with data regarding the target, such as its velocity, distance, and any defensive shields in place. The weapon offered two "smart" missile launch modes. The first mode enabled the missile to function as a heat-seeker. The second mode allowed the missiles to target gravity distortion fields generated by repulsorlift engines. The PLX-2M could also be fired without target lock, preventing accidental strikes on allied vehicles. Despite its intricate design, the PLX-2M could be assembled and combat-ready in under a minute. The integrated microrepulsorlifts allowed it to be transported across nearly any terrain and easily deployed from the shoulder. It gained popularity for infantry assaults on tanks and smaller spacecraft.
Initially engineered for the Empire at the onset of the Galactic Civil War, the PLX-2M was a resilient weapon easily carried by stormtroopers or other military personnel.
During the Battle of Liinade III in 9 ABY, Corran Horn's X-wing sustained damage from a shoulder-launched missile, speculated to be "probably plex-twoems". Despite the damage, he managed a safe landing.