[friagram]

PHP Code:

                SetVariantString(weaponname);
                AcceptEntityInput(particle, "SetParent", particle, particle, 0);        // parent the particle to the weapon
                SetVariantString("weapon_bone_L");
                AcceptEntityInput(particle, "SetParentAttachmentMaintainOffset", particle, particle, 0);
                
                ActivateEntity(particle);
                AcceptEntityInput(particle, "Start"); 


This works for me.