In "No Second Place Winners" Bill Jordan put forward the idea that an airweight J frame in .22 WRF, the precursor to the .22 mag, would be an ideal summer concealment weapon.
If Bill Jordan thought it'd be a .22 WRF would be enough then that's good enough for me.
I have a black widow 22 mag I carry on occasion. One thing I read somewhere is that even with the safety notch, just a little pressure on the hammer will allow the cylinder to rotate freely, possibly resulting in firing pin resting on a rim. Kinda worrisome. I tried it and it's true. If you leave it on an empty chamber, though, it will not rotate unless you place far more pressure on the hammer. I now carry on an empty chamber.
Obviously this limits the gun even more, but I figure that the fifth shot is not really what a black widow was meant for anyway.
I don't see any utility in carrying Pugs in a pair of belt holsters. If one is going to carry in a belt holster, then a slightly larger, more powerful gun is a better option. My suggestion would be carry the LCP and the Pug since you have both guns and they are both small and light. I understand the draw of carrying a gun that feels like nothing, but we carry because we might actually need to use our carry weapons. I don't relish the idea of actually having to use a NAA Mini-Revolver to save my life. I would if that is what I had, but I also wouldn't intentionally limit myself by choosing one as my primary carry gun.
Still, there was a thread several years back in which a gentleman in South Africa was attacked by several armed carjackers (4 IIRC) while on his way home from some sort of event where he was wearing black tie and was armed only with a NAA Mini in .22 Magnum. He managed to repel all of them, killing one and injuring another in the process with four shots. His NAA blew up on the fifth shot, likely because the cylinder pin had backed out and the cylinder didn't rotate completely into place before it fired. The story was sort of outlandish, but it was backed up by news reports and pictures of the NAA in question. So, it can be done if necessary. One does, however, need a lot of skill and a significant amount of luck.
I chronographed some .22 LR and .22 Magnum loads out of a couple of NAA minis a while back. The .22 Magnum CCI 30 gain +V JHP load averaged 1058 fps out of a 2" Black Widow, while the .22 LR CCI Stinger 32 grain LHP averaged 1006 fps out of the same gun with a .22 LR cylinder in place. The same .22 Magnum +V load only did 962 fps out of a 1 1/8" NAA mini-magnum, and the Pug has a 1/8" shorter barrel. I wish I had chronographed the Stinger out of the 1 1/8" barrel also. I did try CCI 40 grain FMJ magnums in the 1 1/8" barrel, and they only averaged 868 fps. Overall, the .22 Magnum was faster than the .22 LR, but the differene was nothing like one sees in rifles.
Now, I think NAA minis are great little guns, and can make reasonable backups. While they are better than no gun, they are not ideal for the role as a primary carry gun either. Unless, of course, one has a choice between the NAA or nothing.
I've have a freedom arms in 22lr 1 1/8 barrel since 1980 and it's been carried more times then any pistol I have owned. However since the newer small pistols out on the market now, the keltec PF9 is getting the primary carry now in a IWB and it in a pocket holster now. I want one of those NAA 22 mag pistols in the 4 inch barrel . I want to design me a leather pocket holster for it and a knife...
My biggest problem with a revolver like the NAA series is single action and so small it then takes extra time and movement to control , cock and fire rounds. For 2oz extra weight you can have a 32 or 380 with one more round and just squeeze off 6 rounds. Plus a bit more grip to hang on to.