The full rifle will shoot 1" all day long with good military ammo.
If I remember, the para with the 18" barrel would shoot about 2".
The para with the 18" barrel felt heavier than the rifle, but they are about the same. For me, the rifle has better balance than the para, but the para make one hell of a "bug out" gun. BTW,
I wouldn't ever shoot surplus of questionable origin. Shoot Portuguese, German, or British, if you can find it. I lke the Portuguese or German the best. Don't ever use corrosive ammo in it as cleaning the gas system will be a chore. The life expentency of the barrel on the Belgians is 70,000 rounds.