Just guessing but the skid is probably the same 1/4” hdpe plastic that they use on the commander. One of these days I’m going to upgrade to uhmh plastic, which is much better and I’ll go with 3/8, maybe 1/2.
As to the locker, the xmr defender, along with the Rock climbing edition x3 and the xmr x3 were the first can ams to get the new locker. All other 4wd can ams have the visco locker, which is 3wd until one of the front wheels spins a few times which automatically locks in the other front wheel - sometimes that’s just to late. There are aftermarket options though.
I really like the xmr defender. The price is $1100 more than the xt, which would be a no brainer for me. There maybe some incentives on the xt not available on the xmr though, plus there are last years models of xt’s around. Still, If you’re like me, you would regret not getting the xmr down the road.