Add a 15 or 22-round extended magazine, and the M1911 can become a pretty fair PDW on its own, as a few of the US MilGroup advisors in ElSalvador concluded after congress forbade their carry of rifles. 1930s gangsters like Dillinger and Baby-face Nelson sometimes added a Thompson front grip and compensator and, with practice, found the combinastion to be a useful, deadly and very concealable PDW.
Funny thing: in my former home state of Tennessee, carry of a loaded or uncased rifle or shotgun in one's vehicle was a no-no. But a couple of interesting pistol adaptations that offered a little more than the average handgun were okay, and legal.
