That is a magpul MOE M-LOK carbine-length hand guard, so yes those are definitely m-lok slots. There are also three m-lok slots on the bottom of the hand guard. The hand guard is not fixed as it is "drop-in" style and can be taken off fairly easily. Here's a link to the product on magpul's website: https://magpul.com/catalog/product/view/id/4702/s/moem-lokhandguard-carbine-length-ar15-m4/category/48/?mp_global_color=118

Alexander, this rifle features a Magpul MOE Polymer Hand Guard no MLOK. You would need this adapter kit to mount MLOK Rail Sections ( amazon.com/Magpul-Industries-M-LOK-Adapter-Guard/dp/B00PDKOBWU ) or slight modification to work : -- youtube.com/watch?v=Sq5lnlR3Mi0

That’s MLOK brotha. Magpul parts bro.

This does appear to be an MLOK. Then again, I don’t have any experience with this rifle nor that exact part. We have a great group of members who will be able to assist you. Thank you.