Hi DE:
The action was "machined" with a chisel and Ruger has $8 into each barrel which heats up so quickly accuracy disappears. If your particular mini shot straight, it wouldn't really matter because of the popsicle stick front sight. If you want to plink at short range, you have to cover your target with the sight (or file it down). If you want to shoot at longer ranges, well, that is why 40 round magazines are a necessity.
That being said, I love my mini and would never get rid of it.
By the way, I can't resist passing this along...
http://www.assaultweaponwatch.com/
Good luck.
CE