That is the least expensive (yet well made and reliable) way to get into a pistol carbine, if you already have a Glock or 1911 'lower' to mate with it.
So I went with the 358 Yeti instead. The 358 Yeti pushes a 180g projectile up to 2600fps from a 16" barrel and a 200g to 2500fps.
And I can reduce down to shoot 38/357 pistol bullets.
Th pistols at the Rowland conversion site are not designed for that kind of stress.
And they will soon show it.