VSR-10 (and more) barrel dampeners/spacers

Someone requested me to make a variation of the m200 dampeners but for vsr 10, so i made 4 different variations so anyone with a vsr10,bar10, well's or so on can use it and with different inner barrel diameters to, if there are any problems please let me know to fix it.

Variation 1 : outer diameter = 19.8mm inner diameter= 8.9mm
Variation 2 : outer diameter = 19.8mm inner diameter= 9.98mm
Variation 3 : outer diameter = 24.5mm inner diameter= 8.9mm
Variation 4 : outer diameter = 24.5mm