"To the director of Voroshilov factory #174 (Leningrad)
Copy: NKSM Glavspetsmash Chief Engineer
Reply to your letter #4/85-76; 247
No conclusions on the "standards" produced by BBSV-2 will be given by BTU. The "machine gun ammunition rack" and "F-1 hand grenade ammunition rack" are untested and exist nowhere except on paper in BBSV-2. In the future, I deem it sensible to cease such correspondence.
Chief of the BTU 2nd Department, Military Engineer 1st grade, Afonin
Deputy Chief of the 4th Section of the 4th Department, Major Gorohov
February 3rd, 1941"