I really like those T numbers on top of the upper. what are those for? The RRA a4 upper i have doesn't have those, so I'm a bit confused. Do the military A4 uppers have them?
The finish is better than my RRA - My RRA upper has small dings here and there where i can see bare metal.
However, the RRA upper fits 'much' better to my ASA lower - no free play. None! The FN from J&T when mated to my lower, doesn't fit very well. Holding the lower with one hand and with my other hand I can move the rear portion of the upper slightly up and down with two fingers.