It's ironic how, given the Orion sales spiel, what an absolutely shite reputation it has for being poorly manufactured and prone to failure
(This quote isn't directly from Specna, but no doubt gifted to a review site by their marketing team)
"ORION gearbox is based on a reinforced frame and equipped with the function of the main spring release. The gearbox has arrays of high-grade parts right out of the box, which makes it characteristic for its reliability and preparedness for further tuning. ORION gearbox is ready for cooperation with M140 springs"