The barrels can be 3D printed for T55, T62, T64, and many more.
AFVs35 137 U-5TS 2A20 115 mm T 62 Thermal Sleeve (for Trumpeter).
Takom AFVs35 136 100 mm D-10T2S Gun barrel with thermal sleeves (for Takom).
AFVs35-135 Gun barrel 2A31 122 mm SP Howitzer 2S1 “Gvozdika” (for Trumpeter)
Also available as the AFV 35-134 Gun barrel 2A31 for 122 mm SP Howitzers 2S1 Gvozdika
for Zvezda
AFVs35 133 Gun barrel D 81TM (2A46 ) 125 mm T – 64 without thermal sleeve
AFVs35-149 Gun barrel BK 90L/40 90mm Kanonenjagdpanzer