I understand that matters to some folks, but I don't carry a weapon to feel prettyThe 642 has a problem with wear showing whereas the 442 doesn't seem to have that issue.
The 640 is the all stainless version and shoots .38 +P a little easier.
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But go to the range and you'll APPRECIATE the extra heft.
After a cylinder or so of +Ps in the Airweights, you don't wanna shoot anymore. Because of it's light weight, the Airweights kick your ass! The all stainless steel 640 has less recoil which means you'll shoot it more than it's Airweight bretheren, hence...better shooting all around!
What have ya got to lose? If you don't care for the extra weight, just sell it. You know you'll get your money back for it and then you can buy the Airweight and punish yourself because it'll sit in a drawer and never get fired because of that damned recoil.
Or, you can buy the stainless steel baby and shoot all day with no dastardly, harsh recoil.
The choice is yours.
The 640 is the all stainless version and shoots .38 +P a little easier. I don't like it for pocket carry because of the weight. It is a fine revolver tho' and works well from the belt. I don't carry mine because I carry something larger (just as easy) on the belt. Good gun tho'.
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the 442 isn't blued ,it's just some type of black coatingThe 442 is blued aluminum alloy.