Maple Leaf M145 VSR Spring

Maple Leaf M145 VSR Spring Upgraded power spring for the VSR, VFC M40A3, MLC-338 and FN SPR A5M airsoft sniper rifles. They give an approximate FPS of 485 on a 0.20g BB. This may come out higher or lower depending on your set-up and air seal. Features: 11mm outer diameter 8mm inner diameter 1.5mm thick gauge 210mm length