Prototypes of the SKS carbine were ready by mid-1944. The logical step after that was to send them to the front for trials on the real battlefield. The weapons were sent to the 1st Belorussian Front, but there was a small issue.
"Your order #622590s given on June 28th, 1944, regarding conducting trials was received on July 15th, 1944, and carried out.
Further trials of the carbines have been held up by the difficult conditions for trials that have appeared on the front.
All combat units are engaged in nonstop fighting, making 15-20 km marches every day, which makes observing the carbines in battle and keeping them safe difficult.
Trials performed in these conditions, especially in brief time, will not allow us to establish the performance of the carbines and make conclusions regarding their acceptance into service.
Based on these factors, I have made the decision to postpone trials until the situation at the front stabilizes."