First thing, ditch the std mag........it's pants.........get a CARM mag, spot on then mag wise.
I've put a longer barrel on, fixed the rear stock so it cant close, (waiting till new year to get a new stock made), and modified the internals, and added a Huma reg.
Well chuffed with it, it's now my go to rat rifle.
They are so tunable it's unreal.

HTH.

Roy.