The PTSÂ® Centurion Arms CMR Airsoft Rail Accessory Kit comes with 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, all included accessories do not need a backing plate to mount it. These airsoft rail segments are perfect for attaching your favorite rifle accessories and are compatible with the PTSÂ® CMR Rail System. The CMR rail covers are also included and easily attach to the CMR Rail System. This improves the overall handling for your rifle and prevents rail bite. Compatible with most Picatinny and Weaver accessories (tactical flashlight, vertical foregrips, retractable bipods), the stippled rail covers incorporate an ergonomic no-slip surface. Additionally, a hand stop and flashlight mount are included in the package, making this a complete rail accessory kit!