Those are grub screws. If they are leaking then someone remove them and did not reinstalled them properly.
Remove the grub screw in question
Clean out all old thread locker
Use either Red or Black Locktite Thread Locker
Let it Dry overnight or you will have to repeat this process.
Clean HPR area of all thread locker debris.
Go shoot fools
BTW you're not supposed to remove those screws, they are essentially just part of the body