Im gonna let you in on a secret, these on amazon are the same as the Zeta. I have both and had them side by side. Same product/design/look etc. Theyre just handguards, dont overthink it.

https://www.amazon.com/gp/product/B073LR3GPC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1