Sorry about your dad. Was wondering why you had not been on for a while.
I agree with
@bigredfish and others on the rifle. Probably some type of AR15, or some other carbine.
Also agree with
@Timokreon on the guy with a pistol in the waistband.
Super agree with
@StevenFromTexas on getting the LTC, AND not assuming the police are on your side when a gun is involved.
The nice thing about getting the LTC in Texas is that you learn where you can carry and where you can't carry. Also when you can use lethal force and when you can't. The next thing about getting the LTC is that many other states recognize the TX LTC so you can carry there. I have had mine for years and years. I am always armed. Also, remember that the use of said gun is a LAST RESORT.
I agree with
@StevenFromTexas on not utilizing open carry. Yes, it is legal in TX, but there are specific rules you need to follow. Businesses have specific signage you need to understand. You give up the element of surprise when you open carry. You become a target by those that want your gun and they will have way more experience taking it from you than you will have on preventing it.
Just last week I was in a pizza place in Tucson AZ where a 20 something guy was open carrying. It is legal there. He was leaning over a table talking to two other guys. His 1911 was in a leather holster on his right back hip. It had no retention. Due to the way he was leaning over, the butt was pulled away from his body. As I walked out I was so tempted to pull it out of his holster as I walked behind him. He would never have seen me and maybe never felt it.
If you are serious about arming yourself, get the LTC and take a good firearms class. There are many good ones in the Houston area. Practice, as it is a depreciating skill.