Just double checking the pros and cons of the ARMS #40 (which comes highly recommended) vs. the KAC 300 sight (assume one gives the insert a toss to the parts box or at least the buttstock).
KAC 300
Lower profile (which is why looking at it)
ARMs #40
* Larger rear aperature (possible)
* Spring loaded
* Has 2.5 ranges (counting 500 meter notch as a half)
* Fits the cut out on the ARMs #19s ACOG mount
* Lower cost
*Appears stronger to side pressure (have not tested
Anything I missed?