Halo, Are these just like the ones that you sold on the Five-seven forum for the PS-90's. If so they are made in Japan for airsoft rifles. Will they hold up to the recoil of a shotgun and still keep the optics in zero? You probaly should disclose this to your buyers. Thanks, Chipleyfla
moderator note: user's warning level upgraded and blocked for two days for this comment, because the information is PLAINLY in the initial post, as well as other posts following it.