It's not a screw?
Normally, it's a small allen screw.
EDIT: Above fps rules by how much? If it's 50fps or more, I recommand you change the spring. As the Velocity reducer can and will fail without you noticing. You could enjure your fellow players that way. There devices are good only for short duration shooting and IMO, for low fps usage only. As in, not to reduce à 400fps gun to 300-350fps.
Vérificateur d'âge: Terrebonne
Last edited by FOX_111; July 9th, 2009 at 18:21..