C# 3D Collider Without Fixed Points or use Mesh Filter Instead?

I have a script that randomly draws a Line Renderer into a beam like lightning and I want to implement a 3d collider into the script. But all the 3d colliders except for the mesh collider appear to have fixed points and the LineRenderer isn't a mesh so it won't work with the Mesh Collider. There isn't a 3d version of the Edge Collider either so that's out. Do I need to convert my script to using a Mesh Filter instead of a Line Renderer or are there 3d Colliders that aren't fixed?

 using UnityEngine;
 using System.Collections;
 
 public class BeamShooter : MonoBehaviour {
     // Prefabs
     public Transform beamPoint;
     public Transform beamPointOrigin;
     public LineRenderer lineRndr;
     // Timing
     public float timeToUpdate = 0.05f;
     public float timeToPowerUp = 0.5f;
     
     public int maxNumVertices;
     public int numVertices;
     public float lastUpdate;
     
     // Use this for initialization
         void Awake() 
     {
         lineRndr = GetComponent<LineRenderer>();
         numVertices = 0;
         lastUpdate = 0.0f;
     }
 
     // Update is called once per frame
     void Update () {
         if( Input.GetButton("Fire1") ) {
             if ((Time.time - lastUpdate) < timeToUpdate)
                 return;
             lastUpdate = Time.time;
             if(numVertices < maxNumVertices){
                 numVertices = Mathf.RoundToInt(Vector3.Distance(transform.position, beamPoint.position));
                 beamPoint.Translate(Vector3.forward * 5 * Time.deltaTime * (1.0f / timeToPowerUp));
             }
             Vector3 currentV = transform.localPosition;
             lineRndr.SetVertexCount(numVertices);
             for (int i = 0; i < numVertices; i++) {
                 float vfl = (Random.value * 4.0f - 2.0f);
                 Vector3 v = new Vector3(
                 currentV.x + vfl,
                 currentV.y + vfl,
                 currentV.z + vfl
                 );
                 lineRndr.SetPosition(i, v);
                 currentV += (beamPoint.localPosition - transform.localPosition) / numVertices;
             }
             lineRndr.SetPosition(0, transform.localPosition);
         }
         if(Input.GetButtonUp("Fire1")){
             numVertices = 0;
             lineRndr.SetVertexCount(0);
             beamPoint.transform.position = beamPointOrigin.position;
         }
     }
 }