So i have been in the market for a scar 17 for a while. It seens to be the only semi auto .308 that makes sense. Wat should I know? Are these prone to any issues? Are like quirks I should know about? Ive read about the optic eating...not sure on that. Theres a local shop that offers a IOP, individual office program(police, fire, mil) which seems to be the best price locally.