This has proven to be the most stable rail solution on the market as well as the most popular and is easily installed on your gun in under 3 minutes.The high-grade lightweight glass-reinforced polymer recover can be installed without the need for a gunsmith and requires no permanent modifications to be made to your firearm.The hpc is the most stable rail mount on the market and the added benefit of a hi power grip enhances the look of your firearm.Rails: PicatinnyMaterial: Polymer