I’ve read about semi autos jamming in clothes when the slide gets caught. That could be a bit inconvenient. In the one scene he uses a revolver. A short barrel over a long barrel fersure….unless you prefer the Wyatt Earp technique of the barrel whip to the side of the head. Stuffing a pistol in a belly band seems very fast access in a fight. Almost like a crossdraw. Someone trying to punch you in the belly will get a surprise. Can’t say I want to try MMA wrestling with a pistol in my hand but if I did hopefully its steel and not glock. A good club is handy in a fight.
If anybody saw Walking Dead a few episodes ago Beth was killed by a cop in a very fast close quarters draw and shoot. Practice works, oops.