Strippers work fine in it, I've got a whole crap load of BXN Czech strippers, it's not really designed for mag swaps like an Ak. They are the same rifle, just different caliber and name. I've never seen the Vz.52 or Vz.52/57 with a chromed bore, Most bores on the Vz.52's are a little rough, I think Green Mountain might make a conversion barrel, but I haven't looked in years. They made the CAI built Vz.2008 barrels from what I remember. Chrome lined bores came on the Vz.58, I have both the CzechPoint and the CAI version, the CzechPoint is chrome lined with a barrel extension to make it legal length. The chamber inserts are sketchy, they are usually held in with threadlock, but can work loose and that's a mess. I've found it easier and cheaper just to buy the 7.62x45 ammo for my Vz.52 when I find it or see it..