a little off thread, but...
im thinking on buying the 4" barrel one(second pic) in .22lr as backup and for fun. is that a mistake? would a .22 mag be much better for s/d?
I have a Mini Revolver with the 1 and 1/8th inch barrel in .22 WRM and the .22LR conversion. I wanted the smallest .22 WRM revolver I could find and that is how I decided on the short barrel.
If I were going to buy another NAA revolver I would buy the Black Widow with the 2" barrel long before I would buy a Mini Master. This link shows a guy hitting balloons at 100' twice in a row (granted not rapid fire):
http://www.gunsandgears.tv/movie1.php?file=naa.flv&autoStart=true
With the super short barrel that I have the accuracy is abismal. I am confident on accuracy at distances of about knife fighting range (only slightly sarcastic). Am I happy with my gun? It is not for sale and probably never will be! It was what I wanted and I knew what I was getting into when I bought it. (Still haven't found anybody who is willing to stand in front of it and play the odds that I can't hit them either).
Just for your information, with the super short barrel, I have seen evidence of bullets tumbling/wobbling on the target paper with some ammunition. Obviously the barrel isn't long enough for dependable accuracy. If you go from knife fighting distances to hitting balloons twice in a row by adding 7/8 of an inch in barrel and actual sights, I would do it.
The NAA revolvers are meant to be "real" guns, small, and high quality. If you are looking for a true target pistol the Mini Master isn't the best, if you are looking for an intriguing firearm you might as well get a small NAA. If you want to have a fun, small, mini revolver, that is cheap to shoot (.22LR conversion) and a bit more powerful for SD (.22WRM), and able to hit something accross the room (2" barrel + basic sights)...go with a Black Widow.
NAA Mini Revolvers are AWESOME and I intend to always own one.
P.S. Don't get the adjustable rear sight on the Black Widow if you get one, and if you are even thinking of it...you should probably buy a Black Widow.