I made a boo-boo when I mentioned Lone Star Guns. I meant to say The Bullet Trap, a gun store and range. The former Lone Star shop was near there, as I recall.
Targetmaster in Garland is still open, I think, and has some good guns, although the prices aren't anything special.
Generally speaking, I've found better deals at Bachman Pawn and Gun, and at the Market Hall gun shows, they usually have tables, with good prices.
Isn't Jackson Armory near SMU still in business? Haven't been past in some months. They should not be confused with the former Jackson Arms that was on Hillcrest across from the SMU campus for decades. They closed years ago. Jackson Armory is unrelated, and is in Snider Plaza. But they do carry many of the collector guns that the other Jackson specialized in.
Academy Sports on Forest Lane has some good values. CZ pistols, which are hard to find elsewhere in Dallas, are in stock or were when I got mine there a couple of years ago. Also have a good selection of Rugers and Smiths.
Finally, the Beretta Gallery in Highland Park Shopping Center is a remarkable shop. One of five Beretta Galleries in the world, they stock a wide range of Beretta and Sako guns, including some of the very finest. Don't look for low prices, but the staff were especially helpful when I bought a shotgun there awhile back. Very good selection of their products.
Lone Star