CTK Precision Ultimate Rail-Pod Simple single screw installation on standard Picatinny rails, including Magpul PRS Stocks. Folds 90 degrees with fast and easy push button operation. Cam locking 1st stage gets you on target in seconds. Fine tune elevation with threaded 2nd stage. CNC Machined from billet 6061 aluminum for strength and low weight. Durable MilSpec anodized finish. Made in the USA!