Just picked up a M305.The rear sight is pretty low quality.Thinking of mounting a Bushnell 3200 Elite 3x9x40 with a CASM mount.Theyre going for 130.00 and I believe their made from a solid billet of steel as opposed to aluminum.Also you mount them using the rear sight pocket as opposed to pounding out the stripper clip guide.Anyone have any experience with this mount?Looking to use this rifle for deer and bear in the fall.So far pretty pleased with the rifle just using iron sights.I believe the new CASM mounts come with a backup peep sight??Thanks for any info!New CGN member.