The PTSÂ® Centurion Arms Rail Accessory Pack comes with everything you need to fully customize your CMR Rail System and make it more ergonomic. This kit includes SIX (6X) rail covers, TWO (2X) long rail segments, TWO (2X) short rail segments, ONE (1X) hand stop, and ONE (1X) flashlight mount. Unlike standard Picatinny rails that need a backing plate to mount it to a handguard, these airsoft CMR rail sections, both 3-slot and 7-slot segments, mount directly to the PTSÂ® CMR Rail System with two threaded fasteners each. The same applies to all the other included accessories, including the CMR rail covers. These airsoft rail covers feature golf-ball stippling that allows for a comfortable and ergonomic grip. This accessory rail kit also comes with a light mount and hand stop, which gives your rifle an aggressive look, while also aiding in improved weapons handling. This is the perfect airsoft rail kit for configuring the PTSÂ® CMR Rail System with custom accessories.