1.But the "Beryl" rifling is more unviersal.
2.Regulator is a nice thing but not nececary, besides this "Beryl" is a modified AKM in it's essence, and the fun fact, nobody never complied about "Beryl" reliability from beggining of it's service, INSAS had problems with reliability. SO you know, fancy features are nothing if rifle does not work properly.
3.Nah, you can have carrying handle, but in the end sling is enough, you think our soldiers were never serving in combat conditions? Sometimes patrols could be very long, and noboy ever said that carrying handle is nececary.
4.Larger weight might be actually advantage, as we know slightly heavier weapons are more accurate.
5.I said that "Beryl" can use different types of 5,56x45mm ammunition, you can use SS109, M193, M855/M855A1, hey I can put OFB rounds in to "Beryl" magazine and fire it without problems.
6."Beryl" sights can be zeroed up to 1000m, but obviously such weapons are mostly designed to fire no further than 600m.