Both low and high M2 HMG static turret `minElev` values are very small. I did some experiments and both M2 HMG turrets can support might better `minElev` values of `-9.4`, compared to current `-5` for low and `-8` for high.
Here is how it looks (hint shows actual elevation):
{F2982764}
{F2982763}
Animations also look fine for new values.