Guns Modify Scar L

[Mad dog 49]

Has anyone else got one of these and if so, do you have any suggestions or tips/upgrades yourve found?

 

Is the hop unit any good? I've heard some say that the hop arm adds a bit too much pressure on the left and makes bbs curve to the left at the tail end of their travel.

[Mad dog 49]

I've tried the 4uad bucking and nub, but I don't think the bucking was too consistent which is wierd as they have been great in all my other stuff. I've got a modify x range and flat nub coming to try next, apparently they are getting decent reviews for this particular rif.