How Tall Is The pack?

I have a quick question if someone could help me. I have a pack shelland all parts I just havent put it together yet. I am remodeling my basement and building a niche in the wall to display my pack when it is finished, but I don’t know how tall to make the niche, Can ANYone tell me the HEIGHT of the pack from the Bottom to the TOP of the split tubing that goes into the gun handle.

4’ x 2’6" should work.