Despite the stereotypes of poor Russian organization, major components of a tank (the gun, the radio, the engine, etc) all came with a technical passport that contained the data for the item in general and this specific item in particular. Here is a technical passport for a F-32 gun installed in a KV tank.
"Production passport for a product
Name: 76 mm tank gun (index 52-PT-354b) for installation in a KV tank
Blueprint (overall) number 1223 (2 pages)
Model/type: mod. 1939
Technical characteristics:
- Barrel caliber: 76.2 mm
- Muzzle velocity: 621 m/s
- Maximum barrel pressure: 2300 kg/cm²
- Shell mass: 6.23 kg
- Barrel length: 31 calibers
- Rate of fire: ~25 RPM
- Vertical range: -5° to +25°
- Horizontal range: 360°
- Recoil length: 360-420 mm
- Maximum pressure in return mechanism: 29-31 kg/cm²
- Mass with toolkit: 1582 kg
- Dimensions: L: 3 m W: 1.2 m H: 0.9 m
Complexity of the product:
- 922 types of parts
- 2106 total parts
- 587 types of machined parts
- 133 types of stamped parts
- Classes of tolerance: 2, 3, 4, 5, 7
- Dominant class of tolerance for stationary parts: 4
- Same for moving parts: 7"
An enumeration of the parts follows, including how much they weigh and how much raw material went into making them. A cost is also specified, but only for the toolkit.