The EOTechs in use are from the Mk18 Mod 1, whose main differences include the Daniel Defense RIS II, aforementioned holosight, and low-profile gas block under the rail with a KAC front sight coupled with the MaTech rear, both folding sights. The Mk18 Mod 0 uses a standard front sight tower with a fixed LMT rear.
So, I guess what is pictured is an odd hybrid, with the fixed front sight, a KAC rear, EOTech, original KAC M4 RAS, and PEQ-15.