I always kinda wanted to like these things. Kind of a best of FAL, AK, and AR in some ways. My recollection is that they were perceived as heavy and expensive back in the day, but I don't know if that was or is accurate.
https://robinsonarmament.com/
nice little overview video here
Looks like they now have a "heavy" (although they are calling is "medium" it appears) in .308, .243 win, .260 rem, & 6.5 cm
https://robinsonarmament.com/xcr-m-competition/
Attachment 51514
along with the original "light" in 5.56, .300blk, 7.62x39, 6.8 spc, .224 valk, & 6.5 gren
https://robinsonarmament.com/xcr-l-competition/
Attachment 51515