It surprised me that my new Milwaukee 6390-21 circular saw didn't come with a rip fence.  I mean, every carpenter needs this essential accessory.  But I guess this all goes to achieving the right price point to be competitive.  So I ordered the only rip fence Milwaukee offers for this saw.  The calibration markings are pretty good, it is strong enough, and the range of extension (how large a rip you can make) is about average.  The annoying thing is that it doens't fit very well.  When you tighten the thumb screw to secure it in position for a specific size rip, three things happen.  The action of the thumb screw against the calibrated shaft causes the adjustment to change slightly as you tighten it, so you always have to double check visually and do a check-cut before starting the rip.  Most carpenters will do this as a matter of course.  But the thumb screw also leaves little dimples in the shaft that make repeated adjustments of the same or similar size somewhat difficult because the tip of the thumb screw tries to home in on previous dimples.  And third, the calibrated shaft cocks slightly, so the guide (that short part of the "T" that rides against the wood) isn't level, but at an angle of about ten to fifteen degrees.  Depending on how you support the work piece, this angled guide can get caught and trip up your cut.  The circular saw itself is such a fine piece of equipment that this misfitting accessory is very disappointing.  Milwaukee ought to fix this; it ain't rocket science.  Nonetheless, with a lot of care, you can make it work.