USDS on the south side and Fort Liberty on the west side. Personally I wouldn't give Point Blank any money for an NFA item due to their stand on restricting their use at their range. If you're a smoker Elmore's might work but be prepared to be ignored unless you are a regular.
I think you might find a different attitude at Elmores. Last few times I've been in there they were very cordial to newbies that came in.
[FONT=&]NRA Life Member[/FONT][FONT=&]-- [/FONT][FONT=&]GSSF member[/FONT]
Certified Glock & M&P armorer
NRA Basic pistol instructor[FONT=&] /[/FONT][FONT=&] RSO[/FONT]
Hoosier Armory I believe has some in stock.