Evanix Rex Rifle

Hello AGN! So I bought an Evanix Rex Rifle and I went over to DonnyFL and bought an Emperor for with the adapter. Got everything in and the adapter is wrong. Talked with the DonnyFL guys and they are looking into why it doesn’t fit. The adapter that was sent is 35 MM. The shroud end cap measures 26MM. Just wondering if anyone has any experience with this and can help. Any help is appreciated. 
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So as mentioned above Donny really does have the best customer service that I’ve ever talked too. I supplied them with The same pictures as in my original post and they were able to figure out that the gun that I have in this picture 
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which is one version of the Rex Rifle has the same threads as the Rex P which is adapter A68 on Donnys website. 

The other version that is possible is this one 
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Uses the adapter A59 on his website. 

I hope that this information will be able to help someone in the future. Thanks for the replies everyone!