NOT A GUN WRITER....But I actually own all three. The post and duplex on my 2.5X looks exactly like a duplex minus the thick part on the 12 o'clock arm.
The #4 in 6X42 has foot thick legs @ 100 yards and inch thick crosshair subtentions, again at 100 yards.
Do not know what exactly you call it but the post and duplex I have is in a long tube 3X. It has a tapered post that is higher than the crosshair. Maybe you have two zeros with the Post tip and crosshair? Just got the 3X Post on a trade .375 M-70 have not decided if I will keep the scope.
