Barrel length restriction

I am trying to determine if I can shoot my 22 with a compensator or not. I understand that with the 22 the compensator doesn't do much; however, I like the added weight in the front. The rulebook says that the chamber and barrel cannot be more than 10 inches. So in measuring would I only measure from the rear of the chamber through the end of the comp or do I measure the whole length of the upper? The gun is a Volquartsen scorpion if that helps. Thanks in advance!

barrel starts at the chamber and ends where the bullet exits, if that measures 10'' or less your ok, comps are legal many shoot them on marvels and older sw 41s came with them too.

Older High Standards had barrel weights that you could hang under the barrel.  That way you could get the balance you wanted without extending the barrel length.

Cort