I had a thought, why not an Brick Piercing railgun?
What I had thought of was a projectile making a brick turn anti raycasting, and when it's though it could maybe revert the raycasting?
It also would have to sound POWERFUL.
Examples of Railguns that would be handheld, but can penetrate cover.
- Halo 4's Railgun.
- GTAV's Railgun
Rorsch MK-1 - Battlefield 4.
And if this is made, all we need next is a item that allows you to see though walls to target someone, like Thermal. but better.