Parker's standard LOP unless otherwise ordered by the customer was 14 to 14-1/4".

If you are looking for longer, that can be easily done with a pad. The CSMC 1" silvers style pad is great because it is flexible and easily conforms to a curved butt like a Parker would have. And for models with the spurred buttplate, a spurt can even be added to the pad to perfectly fit the butt with no modification at all to the wood.

If you want shorter, than... You would have to look for one.

B.Dudley