I am an allies guy.. But I did look at the bf110, it does have a gyro gun sight. You can tell, there is very little deflect . I would like to see it in the Tempest, that is the one a/c that I am sure had one. At least the Tempst II. ( but not in cfs3) I have found out that the p-51 probably did not have one, but there are indications that the P-47 did.
The guys that are dog fight fans, should ask why there are none for allied a/c. in CFS3..