At the posted coordinates is an M114A2 Howitzer, Medium Towed, 155 MM.
Your Task is to visit this weapon and look at the end of the tube, or barrel as most call it.
What you need to know is the weight of the tube. It is stamped in the end and is different on every piece so google will not help you.
If its under 2900 pounds go to N43 45.844 W 71 41.224
If its over 2900 pounds go to N43 45.896 W 71 41.226
Why Red letters? Because Red is the color of Artillery