Look at the flak 88 that was the best German at gun till the pak 40. It was so effective that they put it on the tiger tank. If you want a manual to see what I said I can get it to you.assume AA is reasonably effective against ground units, but probably far outshadowed by the more specialized AT units when it comes to hunting tanks. Anti-air machine guns in are very good for shredding lightly armoured vehicles too.
...Depending on the specific AA gun, in HOI4 it might have high armor penetration but low HA for heavier AA (76-105mm) to reflect its relative scarcity, or high HA and low penetration to reflect the more prevalent small caliber (20-37mm) AA's ability to kill lighter armor, but fail to penetrate the heavier tanks.
The "88" was relatively rare compared to the 20mm and 37mm guns, but more common than the 105mm "heavy" AA guns, which were mostly entrenched in semi-permanent locations. Even heavier AA guns existed in small numbers, but lacked carriages for portability, unlike the 88 and 105. Tow vehicles were one of the main limitations. A Flak battery attached to a division would have a few 88s to protect the larger formation from high-altitude bombers, and a host of lighter AA to distribute among the various companies and battalions for more localized defense against strafing and dive bombing attacks.Was not flak 88 a realtive rare anti aircraft gun and being so heavy would probably limit it usefulness against light aircrafts. I think the aa gun in game represent 20 mm to maybe 40 mm guns who could be used effectivly against light aircrafts as it is the light aircrafts in the game who contribute with air superiority.
Heavy anti air guns would be represented by state anti air.
Look at the flak 88 that was the best German at gun till the pak 40. It was so effective that they put it on the tiger tank. If you want a manual to see what I said I can get it to you.
PS it would be a better in this case to use them as both than 2 separate units. Now if you have to research an at 'ability' for the heavy aa guns now that is another story.
...Possibly the thing to do is have doctrines/focuses that boost AA units hard attack if researched.
The "88" was relatively rare compared to the 20mm and 37mm guns, but more common than the 105mm "heavy" AA guns, which were mostly entrenched in semi-permanent locations. Even heavier AA guns existed in small numbers, but lacked carriages for portability, unlike the 88 and 105. Tow vehicles were one of the main limitations. A Flak battery attached to a division would have a few 88s to protect the larger formation from high-altitude bombers, and a host of lighter AA to distribute among the various companies and battalions for more localized defense against strafing and dive bombing attacks.
The merits of the 88 as an AT gun were not helped by the giant rotating carriage and gun shield. The huge silhouette made it an obvious target for anything with the range to shoot at it, or to call in artillery against it. Late in the war, a gun carriage specifically for AT applications (with a PAK designation, rather than FLAK) was developed (besides the Tiger tank and heavy TDs), but only deployed in small numbers. Most of the 88s remained primarily as AA guns.