PSA offers a good choice of build kits, upper and lower receivers along with other AR-15 parts. They also offer a wide selection of complete AR-15 rifles and AR-15 pistols.
The greater question should be how to put the thing into service in the first place. AK and AR “pistols” are so-called in order to fit within a legal definition. When we normally think of a defensive handgun for use when we are out and about, what normally comes to mind is somethin...