Troy Battle Rail Covers are engineered to survive the most extreme conditions. Constructed from durable, heat and chemical resistant synthetic Polymer resin, the Troy Battle Rail Cover quickly and easily slides onto a 1913 Picatinny Rail and locks into place with a built-in retaining clip. The Troy Battle Rail Cover is scientifically engineered and proven to reduce heat transfer and abrasions to the operator's hand. Best of all, no tools are required for installation.