so shooboy should have never made his barrel removal tool? and people shouldnt be taking their barrels or shipping them to get threaded? what exactly is the problem with removing the barrel if you do it correctly, im serious about this please shed some light please.
Taking the barrel off for service (like having it threaded) or to install a different handguard is not 'repeated' removal or installation and I never said that was a problem. To do so, you might remove and install the barrel a couple of times only and you are correct in saying there is probably no harm if you do it correctly, ...a couple of times.
Taking it off to clean is a different story and not necessary. If it was, you wouldn't need to buy an after market barrel removal tool just to take the barrel off, or a different attachment method would be used allowing the end user to easily remove it. If S&W recommended removing the barrel to clean the rifle, the manual would say so and they would provide a method to do so. Feel free to call S&W to ask them yourself. I already have and they pretty much said what I'm saying. They didn't say it would void the warranty but were pretty clear about not doing it yourself.
Making an analogy here...I bet if a person removed their scope from its rings every time they cleaned their rifle, (or every third, fifth, etc.) it wouldn't take long before the screws on their rings started to come loose on their own.
You can read various threads here on the forum about the nut coming loose on its own. Why aggravate and existing situation or create a new one by taking it off on a somewhat routine frequency?
http://smith-wessonforum.com/smith-wesson-m-p-15-22/182661-having-major-issues.html
Here's an example where an owner is having a problem after taking the barrel out and putting it back in. Is this a common outcome? Probably not, but he's having a problem...ok before, problem after...
There's currently no torque spec on the barrel nut and you will hear various recommendations. S&W won't give you one. Without the proper spec, you risk over-tightening (see thread above), or under tightening and will probably have issues with the nut working loose. A lot of folks may have one of the wrenches, but I bet fewer have a torque wrench. Some try to use loctite to keep a loose nut on and end up with problems when they want to take it off.
Other problems include cracking the upper receiver if the proper tools are not used (i.e. vise jaws for the barrel). Then you get the unfortunate few that try to use vise grips and then post how to repair the scratches they put on their barrel or others who think they should secure the upper in a vice when removing the barrel.
In the end, everyone is free to do what they want with their own rifle and free to decide what's acceptable and what isn't.