The following is the April 1, 2022, Congressional Research Service report, Navy Lasers, Railgun, and Gun-Launched Guided Projectile: Background and Issues for Congress.
From the report
This report provides background information and issues for Congress on three potential new ship-based self-defense weapons for the Navy—solid state lasers (SSLs), the electromagnetic railgun (EMRG), and the gun-launched guided projectile (GLGP), also known as the hypervelocity projectile (HVP).
The Navy’s proposed...
https://news.usni.org/2022/04/06/report-on-navy-laser-railgun-and-gun-launched-guided-projectile