Exp rocket launcher goes poof

So me and my friends were playing on xbox and we got the experimental launcher to drop from the reaper and we both took it into our inventory but when we look its not there we have reset the game and everything in between to try and fix it but still nothing. Any help would be appreciated

It seems that experimentals looted from rivals / reaper are currently disappearing when you attempt to pick them up unfortunately.

We’ll just have to wait for a patch.