Desert Sportsmans is located on extreme west Charleston almost to Red Rock Canyon. When you drive out Charleston you come to a point where the road takes a sharp left hand turn at a large water retention basin. Just past this basin in the left side of the road is Desert Sportsmans.
I am not sure what you mean by "Assult Courses" but they offer IDPA, IPSC, machine gun matches, three gun matches, handgun silhouette, benchrest, small bore rifle silhouette, lever action rifle silhouette, vintage bolt action rifle matches, Highpower .............................................. pretty much anything except shotgun sports other than 3 gun.
If you are interested, I will send you an application for membership but the matches are held on weekends and are open to the public. During the week, the club is open to members only for general range shooting.
* Don't quote me on all the stuff they have there. I am a member but don't participate very often because I live in Pahrump. I don't have the newsletter in front of me to see exactly what events they have there but I believe all of the above is correct.