Rifle
Accuracy 20 мм
5 shot group fit in 20 мм with the distance of 50 meters (for airgun barrels).
Manufacturing
Firearms barrel blanks are made of 42CrMoS4.
Measurement accuracy 0,01 мм
Tolerance in dimensions.
Information:
A barrel twist rate shows the distance in inches which ammo goes after one 360 degree rotation, indicated in inches per turn, mm
Twist
External Diameter, mm
OD
Number of Grooves
N
Length of the Barrel Blank, mm
Length
Groove Diameter, mm
Z
Field Diameter, mm
F