Schrader's drillings employed a short rifle barrel under long shotgun barrels to save weight, while Krieghoff pioneered the use of short shotgun barrels too, similar to the contemporary ideas of Britain's Robert Churchill. All three barrels of the Krieghoff Waldschtz were only 22" long as standard configuration. There even was a special order, full stocked Krieghoff "Steingass" drilling with 20" barrels. It was named after a forester who first ordered such a thing.
Schrader's safety lock did not use coil springs, but long V-springs. It is essentially a spring-cocker, similar to the Beesley/Purdey sidelock in function of the spring. Schrader had most of the guns made to his design by the former Dreyse, then Rheinmetall factory in Soemmerda.
