The Para Hi-Cap Pistols are in my opinion the most beautiful, classic high capacity pistols made. Para Ordinance is most well know for making 1911 style guns for law officers that love carrying 1911's but are restricted by the department they work for to only carrying a certain round, double action only, or at least has to have double action optional. Para sells 9mm's that carry 19 rounds, 40 s&w 16 rounds and their .45 ACP carries 14 rounds.
- an ammunition magazine that attaches to the pistol outside of the pistol grip.
- a threaded barrel capable of accepting a barrel extender, flash suppressor, forward hand grip or silencer.
- a shroud that is attached to, or partially or completely encircles the barrel and that permits the shooter to hold the firearm with the non-trigger hand without being burned.
- a manufactured weight of 50 ounces or more when the pistol is unloaded. a semiautomatic version of an automatic firearm.
because of these restrictions Bushmaster makes their Carbon 15 with a composite frame.
Also an "AR pistol" this Kel-tec PLR-16 is in many ways like the bushmaster Carbon 15, only about $350 cheaper. This is definitely a cheaper AR pistol than the Bushmaster too.
I know there are several other High Capacity pistols, but I will leave them for you to bring to the table. All the above mentioned handguns can be found for sale on Gunbroker.com