Hi guys, thought I'd post some helpful info about poa/poi on the xcr vs the ar.
The current trend in zeroing rifles in .223/5.56 is to zero at 50 yards. This give the most useful trajectory out to 250-300 yards.
The XCR's sight plane is slightly different than an Ar's because buis sit at 3" rather than 2.6" on the AR.
So here is a comparison of a 50 yard zero trajectory on an AR vs an XCR, then a comparison of different zeros on an xcr.