I'm a born skeptic, but tried these out on a whim. Very glad I did, because these - along w/ several other Swab-Its products - have become my go-to for AR & pistol cleaning.
I also use them for many other little household/shop tasks, including cleaning the weekly accumulation of dust/grime that collects in my kydex holsters. The foam-like material compresses into tight spots and cleans them very well.
I clean dust from my stereo knobs, edges of my laptop's ports, all over my truck's dash/stereo nooks & crannies.
But back to guns, a single AR chamber Swab-It can not only clean the chamber, but compresses to clean/lube the leade/freebore areas as well. It'll clean the crap from between rails, optics, muzzle devices, et (many) al.
I sometimes use the same AR Swab-It to also clean my Glocks and/or other 9mm pistols. The AR swab easily fits to clean the 9mm chamber and bbl while still maintaining a firm contact w/ the metal. Clearly, it's intended to be for .223cal/5.56mm AR chambers - BUT - it's only really limited by your imagination & stuff you need cleaned/dusted.
Two quick caveats to my praises of Swab-Its:
1. The prices are too high, bottom line. Amazon often has them priced less than the website. If you have Amazon Prime, you get free 2-day shipping, too.
2. They're advertised as being reusable - and that's true, to a certain point. Within reason, the statement is true. I've cleaned MANY of mine w/ 70-99% alcohol, have them a squeeze, let dry, and it's ready for action again.
There is obviously no way I can tell you accurately how many uses YOU will get w/ yours. Depending on how rough you are, what you're cleaning, what solvent you're using, and the number of times that particular swab has been used, you may get a dozen (or more) uses from a single Swab-It. Or maybe just once.
Soapy water may be better for the material than alcohol. So yes, they ARE reusable; but be nice to them and they'll be nice to you.
Buy w/ confidence.