Go to the chapel to the left of the third mission building, around the the far side and down the stairs, you'll find a door, the chest with the Diamondback is inside.Originally Posted by J-Rox Go to original post
I'm not having any luck with finding a solution to my issue. I completed the three missions and says chapel is unliocked to go claim Diamondback. When I get to the Chapel door says locked. It's been 24hrs now and I tried everything I can think of to get Chaple to unlock. Played back through like if I never did any of the missions and still same result. From what I see it's a Chapel bug of some sort!