Post-Ban rifles configed with "ban features" are not legal here, under any circumstances.
Post-Ban rifles configed with the typical crippled setups are fine. (eg, no FH, no bayo lug, no folder/collapsible stock, etc).
Any preban rifle is fine. So called "large capacity" magazines are also fine as long as they are of pre-ban origin/manufacture. You
can use these mags freely on any rifle.
Transfers are fine as long as the rifle is legal. FTF vs FFL theres no difference in MA, as far as rifles/shotguns go.
Add: One could also convert an "illegal" post-ban into a "legal" pre ban configuration before importing the rifle, and then
it would be legal, but that's probably more effort than it's worth.
-Mike