The Xtreme weighs one more pound than the Xplor, I'm told the extra weight is in the new stock, the forearm is 1 3/4" longer on the Xtreme and the LOP is 1/4 longer. I should have done a side by side before I bought the Xtreme, I think I would have benn better off with another Xplor. Both of the guns have the 3 1/2 chamber so I am looking to trade this for another 3" gun . One more thing, the action on the Xplor and Xtreme are not as smooth as the 3" action on the AL390. just another .02.