Examples of the infamous russian sawed off, the Obrez (which means “cut”).
A common practice well documented within Russian history dating back to 1917 during the Russian Civil War.
At the time, Mosin-Nagant rifles were far more accessible then handguns. And bandits, partisans and revolutionaries eager to get their hands on an easily concealable weapon, had no qualms chopping down the 9 pound, 4 foot battle rifle down to pistol size.
While these modifications worked well for close quarter combat, the recoil was barely manageable and accuracy non-existent.
There’s even a short shory written by a russian author, Arkady Gaidar, about a civil war commander who desperately needed stop his troops from turning their Mosins into Obrezs just before battle.
The commander ordered one of his men to personally take a shot at him with a freshly made Obrez, from fifty paces away. The trigger was pulled and once the smoke cleared, the soldiers saw that their leader was alive and unscathed. Ashamed by their idiocy, they went back to using their standard issued, full length rifles.
For more Obrezs:
The Obrez: Russian sawn off rifles
Films in which the Obrez has made an appearances in (Internet Movie Firearms Database)