Couple of points to consider but first, thank you (and the other military in the forum) for serving.
Next, I am only repeating what I researched. IANAL and am,not pressing knowledge but I feel this info is critical when the stakes are so high (mandatory prison time).
1. For your own protection, please check a little deeper on this subject. I read a thread earlier where ANY 10 and above mag regardless of date of mfr is not legal in MA.
2.Mass Law defines Firearm:
“Firearm”, a pistol, revolver or other weapon of any description, loaded or unloaded, from which a shot or bullet can be discharged and of which the length of the barrel or barrels is less than 16 inches or 18 inches in the case of a shotgun as originally manufactured...
Mass law defines "
Large Capacity feeding device":
“Large capacity feeding device”, (i) a fixed or detachable magazine, box, drum, feed strip or similar device
capable of accepting, or that can be readily converted to accept, more than ten rounds of ammunition or more than five shotgun shells...
The Mass law defines "
Large capacity weapon":
“Large capacity weapon”, any firearm, rifle or shotgun: (i) that is semiautomatic with a fixed large capacity feeding device; (ii)
that is semiautomatic and capable of accepting, or readily modifiable to accept, any detachable large capacity feeding device.....
My literal interpretation of definitions tell me that the XD (because it can "readily accept" a large capacity feeding device, the 13) is not legal in MA. It would be considered IMO by definition a Large capacity weapon.
Now look here:
http://www.mass.gov/legis/laws/mgl/269-10.htm
Draw your own conclusions or further research this. Your mileage may vary. I would love to be wrong. Please show me how....
P...
PS Yes, I am paranoid when it comes to going to prison.