I don't get the point of the CQB model -- I think folks are best served to go w/ either the 12.5" pistol or the 16.5" rifle.
The 14.5" has all of the drawbacks that apply to the 15.5" milsurp barrels insofar as pinning or silver soldering the muzzle device (w/ silver solder it's REALLY easy to get it too hot and ruin the temper on the barrel, though the Czechpoint listings indicate it's pinned).
The selection of muzzle devices are one of the best things about VZ58 and the 14.5" w/ that long flash hider does not allow for you to experience the best of the VZ58. And since it was first built as a rifle, you likely CANNOT convert it to pistol (UNLESS it was imported as a pistol and then converted into a rifle -- definitely something to check w/ Czechpoint on).