AppArmor is also used by Trisquel, so I thought why not adding it to Parabola. There's an out-of-date package in the AUR
https://aur.archlinux.org/packages/linux-lts-apparmor3/
Which can be used to have like the base of the PKGBUILD, the name could be linux-libre-apparmor, there are already apparmor packages in PCR so why not adding the patched linux-libre kernel, to give another option than GRSec. There could also be linuxlibre-apparmor-knock/xen/rt/etc.