The LMR-90 stands for Linear Motor Rifle model 90. It is a dual stage linear motor rifle with a preliminary coil to bring the round onto the rail.
The green battery is only used for the rail structure while the coil is powered by the battery built into the hybrid magazine.
This firearm fires a 5.45 x 48mm discarding sabot. Flat tipped sabots are generally used for soft targets and are available in hollow-point.
The display is only clicked on for in-and-off field diagnostics and to check the battery. The display will generally be turned off to avoid illumination that would give away the operator's position.
Foregrips can be swapped out for other hardware such as picatinny mounted grenade launchers. In such case the operator can move their hand back to the original foregrip in front of the trigger.
The sight is labeled multi pass because it can layer optical views for a unique targeting experience.
The current stock is non adjustable however, you can buy a configuration that allows for stock extension.
For size reference I have made a quick shop of the rifle in an operators hands over on my artstation since I can't post two pictures here: www.artstation.com/artwork/0Rx…
damn, this is a fine weapon. Always loved the P90 ever since Stargate SG1 and then the elite soldiers in Metal Gear Solid, it has been a huge influence on my own weapon design. And I love how you took its appealing futuristic good looks and made it into an actual futuristic weapon.