Here is a link to the MA law concerning non-residents.
One might infer that you would be safe as long as it is locked up in the trunk. Also, print out and carry a copy of the federal interstate travel law concerning firearms.
New York High capacity
NYS has it's very own assault weapons and high capacity magazine ban. Mags with a capacity of more than 10 rounds are illegal unless manufactured before Sept 13, 1994. Pre94 magazines are still available at a premium price. See Link Removed
Aimpoint or Eotech
I just went through the Aimpoint/Eotech selection process. I have one of the Aimpoint knockoffs (Tacpoint) and it works well so I know I would like the Aimpoint. I did most of my research on AR15.com and found perhaps a slight bias in favor of the Eotech, from those...