Yes the ptrs upgrade makes the unit an ammo sucker. Guards rifle also dont need upgrade they already have ptrs. The ability atm is more of a disability. Using the ability means sucking ur ammo empty.
but 6 man is ok with mobile reserves option to get 7.
And 3 ptrs rifles.
I also agree with removing the useless Artillery. It has nothing to do wiht the doctrine.
While i agree that PTRS cons are bad now saying that artillery has nothing to with Soviet anti tank is wrong.
All Soviet gun where always supplied with both HE and AT shells as doctrine prescribed at the time. They would even fire en masse at large tank formations. This is doctrine of having all gun with HE and AT is reflected in the game by the ZIS3 gun as well.
Perhaps replacing the ML20 with the B4 might work. The b4 when used right can be a potent heavy tank killer (and anything smaller). This would allow it to stay a artillery unit ability while still staying within theme.