As mentioned in my previous post, I want a marginally tricked out intermediate caliber pistol as a hold-over until I get my fully tricked out AR-15 down the line. Initially I was looking at the PLR-16. It looks like there's a good chance that getting a PLR-16 with a 12" barrel will be either impossible, or obnoxiously expensive for what it is.
Right now the top contender is a Krinkov pistol in 5.45. The only problem with that is trying to put a red dot on it, which is kind of integral to my plan to use it as a carbine stand-in.
Any other suggestions for intermediate caliber guns that feed off of readily available magazines and cost $350-450 are welcome and appreciated. Getting things that have sufficient barrel length to milk a majority of power out of their respective cartridge is preferred. Numbers I've heard are 10" for 5.45 and ~14" for 5.56