A noteworthy feature of the rifle was the metal plate at the far end of the stock. This protective metal sheet was attached to render the weapon useful as a climbing tool and hiking stick for the mountain troops that fielded it. 
On the minus side, soldiers often complained of the rifle's heavy recoil, describing it as "unpleasant".
The Gewehr 33/40 was requisitioned in 1940 as a variant of the Czech vz.33 for Germany' specialized alpine troops. The rifles were even assembled in the same factory as their inspirations in Brno, Czechoslovakia. 
The rifles served with numerous units in harsh mountainous conditions throughout World War II.
The Gewehr 33/40 had a short production run, however. It was discontinued in 1942 when the Brno complex converted to the standard Karabiner 98k, which was now supplanting nearly all German service rifles in the Wehrmacht. By the end of the war, a meager ~120,000 Gewehr 33/40s were completed. 
- Československé armádní pušky vz. 24 a 33
- Ball, Robert W.D, "Mauser Military Rifles Of The World", page 107