M68 and Comp M3....whats the difference

[BCmJUnKie]

Im wondering the difference between the M68 and the Comp M3. Other than a clear lens I cant tell

[BCmJUnKie]

Or is the M68 comparible to the Comp M2? The body looks just like my M3, the caps and switch.

[Failure2Stop]

The M68 has gone through a few models.
The first I have experience with was the Comp M, then the Comp M2, then they skipped to the Comp M4.

The biggest difference between the M3 (the product improved M2) was the availability of a 2 MOA dot, and increased battery life.