I see all this talk of the advantages of using a 9 mm buffer.  I have "H" buffers in all my carbines.  I see in the Brownell's catalog that a 9 mm Colt buffer is listed at just a little more than a rifle buffer (much cheaper than a "heavy" buffer listed elswhere in the catalog).  Before I order, are these the heavier (5.4 oz.) buffers or do I need to go to another brand to get a heavy buffer.  I've never had a malfunction with an H buffer but would like to try the heavier version.

Thanks