I think it's a warranty issue. Do you have any pictures of the broken part?
You should contact the warranty team at Wolverine Supplies...
Back in the past, I had a few warranty issues with my XCR (I've supplied them pictures of the problems in my emails) and they were very fast to ship me a replacement part...
You can contact John Hipwell at john@wolverinesupplies.com
I had 3 issues with the XCR.
First, it was the Recoil Buffer pad which had to be changed because it was all worn out, even if I ran the gun on a Gas Level 2 (lowest). Maybe it was because of round count or cleaning oils or both.
Second issue I had, was with the bolt hold open which was starting to worn out on the tip.
It was not holding the bolt open properly and the smallest touch to the release button was closing the bolt. Even shaking the rifle too hard, when bolt was open, was closing it.
So they sent me a replacement pad for 9.50$ and a new Bolt Hold catch for 19.00$. Respectable prices.
Received it in a few days... Nice service at Wolverine Supplies.
A few months laters, I had the third and last issue on my XCR, which was a broken firing pin (weird), which was covered by the warranty. They sent me a new one in a few days also!
If you're curious, here's what the firing pin looked like when it broke: