Just took this photo, not a great comparison b/c the Short and the Long have been messed with....but might give you an idea....
View attachment 314975 Top is of course the Long. It has a 23" barrel on it, and a plenum addition, making both the barrel and tube about 2 inches longer than OEM.
Middle is the Standard, bone stock, other than the buttpad/hook.
Bottom is the Short. It has a 16" barrel on it, and a plenum addition, making the barrel about 2.25" inches longer than OEM, and the tube roughly 2 inches longer.
If not including the buttpad, the OAL of the Long (with noted changes) is about 34 inches long, Standard is about 28," and the Short (with noted changes) is 25.75."
OEM lengths:
Long=31.5"
Standard = 27.9"
Short = 23.6"
The Short, with the 16" barrel is my favorite, which would make it almost the length of a Standard. So, like I said earlier today, the Standard is sorta the Goldilocks.
I should add, since it's not abundantly clear here, that the rear-cocking is an absolute deal-breaker for me. Luckily I do yoga 4 times a day, it helps me stay limber enough to arrive at the physical contortions that it takes to simply reach over the top with my left hand and cock the gun.