Arsenal 107CR SBR question

Of the two that are sold, one with muzzle attachment the other without; which is going to be the easiest to Form 1 and SBR? I have a 107CR with the removable muzzle attachment on order and I am curious as to what is involved in SBR’ing it and what krink brake is commonly used on this rifle, the Schuster that Adco sells?

Thanks in advance

Spooky