There seems to be an issue where a conflict with the addon ULib is breaking the NWVar function GetTargetPlayer. I have researched the cause and even though the issue is the ULib developer's responsibility, I will try to stop it.

fixed an issue with the temporary patch

Removed the diagnostic mode and implemented a temporary patch that should fix the issue where some players couldn't use the weapons.

added a diagnostic mode for people who can't get it to work correctly. change the cvar hexshield_diagnostic to 1, try using the weapon and tell me what appears in the console.

improvments

Added a version that follows you around, added color change cvar, gameplay improvements, made the grenade stick to dynamic objects, added new sounds, enhancements

possible conflict fix

no more bullet penetration for m9k weapons