Thanks Chuck. I hadn't found the weight of the Irvine without the muffler. The stock muffler on the Irvine is a PIG at 2.7 oz. Now knowing that the Irvines can be had for $85 and they're only slightly heavier (without muffler) than the OS and Magnum, that makes my decision a bit more difficult...but this is exactly the kind of info I was looking for.

-Tom