Let's not add the weapons and armor to construction, as the creator picks which ones it gets, so it will vary in price.
I'm fine with making the armor masterwork, though.
We can add to the flavor text that the creator must furnish the weapons and armor, although I think that is generally implied.
We can say it, but let's not splice sentences with commas.
"The listed cost does not include any equipment carried by the magen. The sample magen has a suit of masterwork studded leather, halberd, and two throwing axes, which would add 201 gp to its Construction cost."
Then I guess we're ready for the next one.
Sounds like exceptional reach, improved grab, constrict, and acid. Seem about right to you?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.