I seem to recall even you having an issue with a Defiance action and AW mags a few (just over 3?) years ago. The mags would work most of the time, but sometimes the bolt would fail to pickup a round from the magazine. In fact, I believe it cost you some critical points at a Mammoth Cave match stage. Sucks when something works most of the time because the failure never happens at a convenient time.
Yes, the AW magazines will work sometimes without modifying the latch to get the magazine seated a bit higher. If you want to be 100% confident in feeding, see what your gunsmith thinks when he is putting together your rifle. The latch might need modification or it might be just fine as it is. Also understand modifying the latch might make standard single-feed AI magazines sit slightly too high and in some cases won't lock into place properly. Having a rifle setup to 100% reliably feed from both single-feed and double-feed magazines is sometimes not possible or might be a compromise.
Mark